Northern Nut Growers Association Thirty-Fourth Annual Report 1943

by Unknown

SURVEY REPORT

John Davidson, Chairman of Committee

This survey of nut tree growing in the United States and Canada is a cross section of the industry and has been conducted through the membership of our Association. Questionnaires were submitted to all members, of whom a very satisfactory percentage responded with reports which usually were as complete as the age of the planted trees made possible. Our thanks are due to all who had the patience to reply to so searching a questionnaire. Their reward, we hope, will be increased by nuggets of information from others. The survey committee is indebted to the officers of the Association, to Mr. Slate particularly, who took care of the multigraphing and mailing drudgery, and to the experienced men who lent invaluable aid in formulating and revising the exhaustive and detailed questions.

The results are here set forth in three sections: Northern United States, Southern United States and Canadian. It is evident that trees which do well in the south may act very differently in the north; yet, to a certain and very important extent, the experience of the south has a bearing upon conditions in the north. For example, the pawpaw, though not a nut tree, has seemed to edge itself into the affections and interest of many nut tree men. It is in reality a tropical fruit which has adapted itself to northern latitudes. The pecan seems to be trying to do the same thing. Both illustrate a way of working that nature practices more or less with all species. By cross pollination and selection, human hands are having a part in speeding up this process of adaptation in pecans, Persian walnuts and other tender species. In fact, this is one of the jobs to which the Association is dedicated.

We wish here to pay tribute to the nurserymen of this Association. Most nurserymen are intelligent and honest but sometimes they have a tough time of it. Their worst competitor is a nurseryman who sells seedlings for named varieties, who advertises widely and prospers upon the work of others. When we think of the painstaking care of the honest nurseryman, of his days of drudgery, of the thousands of failed experimental trees and plants that he destroys, of the service he renders his fellows, we know that we should make slow progress without his help.

The conscientious worker in the experiment stations is in the same category. He does his best work largely for love of it.

In addition to many letters and other valuable sources of information this survey covers reports from more than 150 planters of named varieties of nut trees. Many are also planters of seedlings from selected and named varieties with which they are experimenting and from which they are making selections for future tests. Some are experimenting with cross pollination. As one example of careful work, we have now on file blue prints from the New Jersey Department of Conservation and Development, from Gerald A. Miller, of Trenton, showing exact locations by name and number of one of the largest variety collections of hybrid walnut trees in the world. From the Brooklyn Botanic Gardens, Arthur H. Graves, Curator, we have valuable records of the breeding of chestnut trees, with selections made primarily for tree growth and timber production. There is also hope for some good nuts from the trees. The timber, in money value, is of course more important than the nuts. If successful, we shall again have both.

It is difficult to interest "hurry-up" Americans in planting trees for future generations. They want results now. But the sooner we develop reliable and adaptable fruiting trees for general planting, the sooner will thousands of people begin to plant trees. The late rapid growth of membership in this Association shows an awakened interest that could be swollen into a mighty flood of tree planters if good trees were available. If there were more agencies like the Tennessee Valley Authority, more trees of the better sort would be developed. Its tree crop activities have now been transferred to a "Forest Resources Division" under the supervision of Mr. W. H. Cummings, and its testing and selection work is going ahead steadily. Thomas G. Zarger, Jr., Botanist, is handling the black walnut work in connection with other investigations of "Minor Forest Products." The headquarters is at Norris, Tennessee. Charles V. Kline, now Assistant Chief of the Watershed Protection Division, still keeps his old interest in the black walnut and tree crop program. Definite and important results are bound to follow from so sustained and well organized a project. Most state agencies complain of lack of appropriations and help. The real trouble lies in lack of vision and knowledge upon the part of legislators. The President has proposed an immense program of communications and highway development as a post-war project. We suggest that fruitful land is still more important, and that highways through desert countries are almost unknown except as means for getting from one fruitful land to another. Perhaps this Association could do more than it has done toward spreading the gospel among legislatures.

The largest source of contribution to the survey is, of course, from the Northern United States. For purposes of tabulation, we have included everything north of Central Tennessee in this class. Nearly one hundred planters of nut trees contribute their experiences in this section. Of the lot, only fourteen of them plant trees for sale as nurserymen. Today we could keep more of them with stocks sold out. Seventy-six are interested in planting primarily for the production of nuts; fifty-seven, in grafting and budding trees from named varieties; forty-five in planting seed from the better varieties, either for production of stocks upon which to graft or, in large quantities, for observation and selection. As many as twenty-six are doing important work in hybridizing. Fifty-one are top-working young trees to better varieties. Only twenty-one count upon the growth of timber for a part of their profit. But certainly the growth of timber, especially black walnut, is not an item to be left out of consideration. Much, here, depends upon the manner of planting, whether in orchard or forest formation. However, even in orchard plantings, the stumps alone are valuable for beautifully patterned veneers.

Fifty-seven correspondents tell us that they are testing standard varieties, while forty-two are interested in discovering and developing new varieties, certainly an index to the pioneering and creative urge which dominates many of our members. As is to be expected, most of our newer members are thus far feeling their way by growing a few of the better varieties for home use. Only nine of the whole number say that they are working with nut trees at an experiment station.

As to the species of trees being planted, black walnut heads the list with eighty-nine planters. Persian walnuts are next with seventy-three, including five who specify Carpathians or Circassians. Sixty-eight are planting Chinese chestnuts, and sixty-four hickories. Filberts and pecans are tied with fifty planters each; forty-eight say they are planting hazels; forty-three heartnuts; and forty-two persimmons—if we may include these trees for the time being among the nuts. Thirty-eight are planting butternuts; thirty-two, Japanese Walnuts; twenty-eight, pawpaws; twenty-seven, mulberries; twenty-four, Japanese chestnuts. After these, in order, come almonds along the southern borders, beech toward the north, hicans, tree hazels, oaks, Japanese persimmons, honey-locust, jujube, black locust (the correspondent explains, "for bees and chickens"), Manchurian walnuts, and finally, coral and service berries.

As an indication of the adaptation of species and varieties to the climates in which these men, and several women, are working, they listed at out request the following native trees found most plentifully in their sections. Black walnuts and hickories stand at the head of the list, as reported by seventy-five correspondents each. Then follow in order, butternuts, hazel, beech, oaks (probably overlooked by many), pecans and chestnuts.

Of nut trees found sparingly in these sections, butternut trees, surprisingly, take first place, indicating broad adaptation but a certain weakness, perhaps a slow susceptibility to blight or fungi, which prevents this tree from being found plentifully. It is significant that it is found most plentifully in the more rigorous areas of New England where fungous ravages are discouraged by cold. Add chinquapins to the number of scarce trees, and the list is complete.

As a further gauge of climatic conditions, fifty reported that peaches are reliably hardy in their sections, while fifty said they are not. This, according to the late Thomas P. Littlepage, is a fairly reliable index to the climatic adaptability of present varieties of northern grown pecans. Ninety-two planters reported that their seasons are long enough to mature Concord grapes. Only four said "no." For Catawba grapes? "Yes," said forty-two; "No," fourteen. For field corn? "Yes," ninety-three; "No," four. This question was improperly asked. Field corn varies too widely in length of maturity for accuracy in this respect.

Lowest temperatures expected range from 8°F above to 30°F below zero, with the usual lower range in the greater portion of the northern states, from zero to 12° below. Lowest known temperatures range all the way from 10° to 52° below, but in most portions from 15° to 35° below.

Returns indicate that winter injury is not always, nor even usually, the result of low temperatures but, rather, to the condition in which the trees enter the winter. If late excessive growth leaves them with wood not wholly dormant, they suffer. If not, they will stand extraordinary low temperatures with little or no damage. One way to guard against this damage is by preventing late growth. A means of doing this will be found in an important contribution by Mr. H. P. Burgart, of Union City, Michigan. Mr. Burgart says:

"After 21 years of experience with growing, selling and planting nut trees, I have had to have a neighbor show me the best way to care successfully for them. I have studied and practiced Mr. Baad's methods, and in comparing them with my former practice, and with the practice of others who have failed with their trees, I will suggest the following cultural procedure to be given all plantings when possible, and to be continued for at least three years, or even longer for best nut production.

"Nut trees should be given clean cultivation right after being planted (in the spring) and until August 1st. This encourages root growth and conserves moisture. Then sow a cover crop of rye, cow peas or soy beans to take up moisture, slow up growth and prevent the late sappy condition that is often responsible for winter injury. Leave the cover crop over winter and turn it under in the spring for humus. Before turning under, a light application of some kind of manure, along with some superphosphate and potash, should be sprinkled around each tree. Then thorough cultivation again until August, and repeat.

"Soil for nut trees should be tested for acidity, nitrogen, phosphate and potash. It has been determined that most nut trees prefer a pH range of 6.0 to 8.0; but I have frequently found people planting trees on soils of 4.0 and 5.0, where nothing but sickly growth could be expected.

"Where it is not possible to work all of the ground between nut trees, cultivation should begin with a three or four foot circle around each tree, annually increasing this space with the growth of the branches. Cultivation, with attention to humus and fertility, are necessary to proper tree growth and nut production. Sod culture will never do."

Mr. Burgart's method has the advantage not only of guarding the trees from excessive winter injury but at the same time adds an almost immediately available source of humus and nutrients to the soil for spring growth. If followed, it should greatly reduce the number of reports of winter injury, failure to start, and of weak growth afterward.

Excessive summer heat is not so great a problem in most portions of the northern states. The highest expected temperatures range, in our reports, from 86° to 110°; mostly from 90° to 100°. The highest known are reported to be all the way from 95° to 120°, but mostly from 100° to 110°. A method of guarding against heat damage will be found in a communication from Mr. H. F. Stoke, of Roanoke, Va., which appears later in this report.

Drouth and hot, dry winds are more dangerous enemies than either cold or heat. It is somewhat ominous that, out of eighty-three reports, forty-two, originating all the way from Maine to Oregon and from Canada to Tennessee, report the occurrence today of frequent drouths, while forty report hot, dry winds. Surely the need for tree planting is immediate and urgent. Mulching, and the protection of recently planted trees by wrapping their trunks, are preventives of some damage, but can not stand up forever against the longer and longer periods of drouth now being reported, during which the water table is gradually being lowered beyond the reach of tree roots.

The length of the frost-free season has an important bearing upon the production of nuts after the trees are matured. This is true in the south as well as in the north. One of the most frequently reported causes of loss of nut production in southern sections is an early spring, inducing growth of buds and blossoms, followed by a frost. No protection seems to have been found against this damage except by use of heavy smudges. Large orchardists protect themselves, but planters of small groves rarely do so. This explains the autumn scramble, reported by many members, in search of early fallen nuts. We should continue our search for trees which produce nuts of early maturity. Thus far the search has not been too successful among most species, but some progress has been made and the future is more encouraging in this respect than it was a decade or two ago. Some early maturing nuts have been found and pollen from the trees is being used for cross-pollination with better known nut producers. In the northern states, dates of the latest spring frosts range from April 1 to June 1, with the average around May 15. The earliest fall frosts come from Sept. 5 to Oct. 15, with the average about Sept. 15 to 20. Where the frosts fall much outside these limits—too late in the spring or too early in the fall—protective measures will help but will not always prevent damage.

Soil Conditions. There is a slight preponderance of clay soils over loam among the returns from planters. Loams and sandy loams are tied for second place. A smaller number report that these top soils lie shallow over hard-pan or rock. Fewer still report a soil underlaid with sand or gravel.

By far the best growth for most kinds of nut trees, as well as the best production of nuts, is to be found where trees are planted in deep loam. Next come the trees in clay loam; then come trees in sandy loam and in clay over sand or gravel. Numerous complaints of poor growth come from members who have trees set in a soil which is shallow over rock or hard-pan. Some of the hazels and butternuts are reported as able, for a time at least, to establish themselves in such soils, but their fight for survival seems precarious and is apparently short-lived. Black walnuts, particularly, require deep, rich soils into which their long taproots can easily penetrate. This is one of the few nut tree facts so definitely established that there can no longer be any doubt about it. The reports show that the planting of black walnuts in any but good deep soil should be discouraged. It leads only to disappointment and often to loss of interest.

A somewhat sandy soil, particularly if loamy, seems adapted to the planting of chestnuts and to such trees as do well on ground that will successfully grow peach trees. If such soil is found upon a hillside or hill top, so much the better. All such soils, of course, require more attention to fertility maintenance, for they leach out more quickly than soils with more of a clay constituent.

Do any of the nut tree species prefer an acid to an alkaline soil? This is a question our questionnaire does not answer. Thirty correspondents say their trees are set in a lime soil, fourteen in an alkaline soil (which may or may not, in the commonly accepted usage of that term, have lime as a source of alkalinity). Sixty-one report an acid soil. Only eight of this group report the use of lime, two the use of bone meal, and one of wood ash as acid correctives. Unfortunately, we did not ask definitely about the reaction of trees to the use or non-use of lime. Puzzled by this comparative neglect of lime as a corrective on acid soils, we asked Mr. H. F. Stoke, of Roanoke, Va., a very accurate and acute observer, who had reported plantings in both kinds of soils, what his experience had been. Also we asked Miss Mildred Jones, whose experience with nut trees is second to none, the same question. Their replies follow:

Mr. Stoke says: "In response to your inquiry, 'What nut trees, if any, do best in acid soils?' I should reply that the chestnut leads the list, followed closely by the mockernut hickory.

"Throughout its native habitat the heaviest stands of the native chestnuts are to be found on acid soils over granitic and sandstone formations, rather than on limestone ridges. The best stands are on granite ridges, partly due, no doubt, to the poverty of sandstone soils.

"The mockernut hickory occurs about anywhere on the poor, acid, clay soils of the south, its vigor depending on fertility. Shagbark does not occur on the acid (granitic) Blue Ridge mountains, but is found on the limestone Alleghanies running parallel only a few miles away. I have never seen a shagbark hickory between Roanoke and the coast, more than 200 miles away, but it occurs freely to within two or three miles on the west. The difference is not in elevation or rainfall, but in the soil.

"On the other hand, black walnut occurs on both acid and limestone soils, but seems to prefer the latter. Part of its preference may be due to the generally greater fertility and better drainage to be found in limestone soil. Persian walnut, I believe, when on its own roots, is more or less allergic to acid soil. Wild hazels grow here on both limestone and granite soils.

"Frankly, I believe the matter of soil acidity, as such, is rather over-emphasized. There are other factors entering into the problem that are of as great or greater importance. I doubt if there was actually any really alkaline soil, in its native state, in the humid region lying east of the Mississippi River. In the glaciated region lying to the north, the soil seems to have been more nearly neutral (pH 7). Such was the case in Iowa and in Minnesota where I homesteaded many years ago.

"Throughout the south the soil averages much more acid, even much limestone soil being greatly benefitted by liming. North or south, soil acidity is greatly affected by drainage and by the resulting native vegetation.

"Peat or muck soils are notably acid; also they are notably deficient in potash. The addition of wood ashes greatly benefits such soils in two ways. On the other hand, the addition of wood ashes to a soil already alkaline might be harmful even though in need of potash.

"In the last several years I have been making some soil experiments that I may write up when I am sure I know what I am talking about. In general, I may say I should prefer a soil slightly on the acid side for any and all tree and farm crops if I had an eye to future fertility. Lime breaks down vegetable matter and makes its constituent plant foods quickly available, but prevents a build-up of humus in the soil. The effect is very pronounced in times of drought, the alkaline soil crops drying up much more quickly than do those on acid soil. On the other hand, such soil elements as phosphorus seem to require the lime as a flux to prevent the phosphates from becoming fixed and unavailable to crops.

"In regard to peat moss, it is undoubtedly acid, but it is beneficial in its water-holding properties and in the comparatively slow release of its nutritive elements. Lime added to the peat will break it down rapidly and make it more available as a fertilizer, but until the decomposition reaches a certain point; its effect is to impoverish rather than to enrich the mixture. This seeming paradox can perhaps best be explained by some experiments I have been making with sawdust. A number of plots were prepared and given various treatments, including mixing one surface-inch of sawdust with the soil, and wheat was sown on the area.

"Wheat sown on the test plot without any treatment or fertilizer was normal for the poor clay soil on which the experiments were made. Where sawdust, only, was added, the wheat came up but sickened and produced no filled heads. The same was true where lime was added to the sawdust. Where heavy applications of nitrate of soda were added to the sawdust treated plots, both with and without lime, the 'sickness' disappeared and wheat was matured.

"My analysis of this, coupled with experiments in composting, leads to the following conclusion: During the period of decomposition of the sawdust (hastened, no doubt, by the lime), the bacteria of decomposition fed so heavily on the nitrates in the soil that the plants were starved. When the material had reached the condition of humus, the bacterial activity decreased to the point where fertility was restored.

"The above analysis accounts for the fact that coarse vegetable material, injures crops, when plowed under, for the current season. Fresh succulent material decays so quickly that it becomes almost immediately available, releasing its constituent plant food.

"With proper conditions of moisture and aeration, sawdust, when mixed with quickly decaying material like kitchen garbage, can be reduced to an excellent, usable humus in three summer months. In fact, it is then better material than if permitted to lie out in the weather for fifteen years.

"There is another factor I think important in tree growth, especially where summers are hot, and that is soil temperature.

"For any of our nut trees I should say that an acidity test of pH 6 to 7 would be entirely satisfactory. If the soil is infertile, some form of humus should be worked in at the time of planting. If much such material is used, some lime may be added. Better yet, wood ashes and bone meal will furnish potash, phosphorus, and the lime necessary to correct acidity and maintain the phosphorus in an available condition. Add to this, proper drainage and cool soil achieved by, first, cultivation, and later by heavy mulching, artificial shading, or shrubby undergrowth extended outside the root area, and your tree should 'go to town.' When the tree is large enough to shade its own root area it will take care of its own soil refrigeration. Nature knew what she was about when she planted trees in forests. Trees require warm heads (sunshine) and cool feet (shade), just the opposite from us humans."

Mr. Stoke's letter recalls a very ancient Arabian proverb connected with the date palm. "The date palm tree must have his head in hell and his feet in water." We are indebted both to Mr. Stoke and to the Arab scientists for many things.

Miss Mildred Jones' reply, fortunately, goes into other and equally important phases of the same subject. She says: "Anyone who is going to lime and fertilize nut trees should take at least a five year period for his work, using lime and fertilizer each year, and not dump it all in one year, then wait for results. He should study the return on a five year basis. One year is too short a term. Weather conditions can upset a program to the extent that both lime and fertilizer may not have their effect until the following year. Let those who really want to know, make graphs of growth in young trees and of nut production from older trees, in pounds, for five years, as against five of the same years during which trees similarly situated received no fertilizer or lime.

"I shouldn't be at all surprised if those who state in reports to you that they have an acid soil, merely have a top acid soil. They may be growing their trees in basic limestone soils. Walnut trees grow in this environment very well, because they are found growing wild in woods where laurel and other types of plants loving an acid condition grow. This is true here in our county, but these soils are not seriously acid. They grow good garden crops.

"Ground, or pulverized, limestone is the safest type of lime to apply to trees or crops, in my estimation. Some of it is ground so fine that it looks like hydrated lime and is used for medicinal purposes. I am inclined to think that any reports you received that noted injury from the use of lime may have been due to the use of burned lime (calcium oxide) which is caustic when wet. This type of lime may be used in winter, but during the growing season, or too close to the growing season, may injure trees. I believe such injury depends entirely upon weather conditions, but it is a good thing to be on the safe side and use a lime which will not have the hot reaction that burned lime has.

"Your reports will serve an excellent purpose if they lead to getting a yearly record by planters on bearing and tree growth of their varieties. Few people know enough to go into the matter of soils and treatments intelligently. One can hardly blame them. It is a baffling subject. An unbalance in one element will lock up another element until one has quite a time unlocking them again. It seems that a conservative middle course is about the best to advise."

Upon reflection, it seems likely that if our questionnaire had asked specifically about the use of lime, many more reports would have been received of its use.

In response to an inquiry as to how weed competition near young trees is controlled, the replies are encouraging. Forty-seven practiced mulching; forty-five, mowing; thirty-four, occasional cultivation; twenty, regular cultivation, and a few others, slag or cinders around the trees. As is evident, some used several of the above methods. A few used none and suffered losses. Their honesty is admired, and their experience, disappointing as it is, is useful information.

As to fertilizing, forty-three reported the use of manure in some form as the principal material; twenty-eight used nitrogenous fertilizer; twenty-one, a complete fertilizer. Other materials were, in order, lime, compost, bone meal, ammonium sulphate, wood ash, tankage. One used a mixture of muck and manure and got results in excellent growth where the use of muck alone produced unsatisfactory growth. Several reported injury from too much fertilizer or from too late an application. Tree growth was thus pushed on into late fall; the trees were too sappy to stand the winter freezes and suffered from winter killing. The same result was reported from "over-cultivation." In this connection, we refer back to the letter from Mr. H. P. Burgart, of Michigan, whose suggestions on cultivation and fertilizing are well worth careful study and practice by all who have had this trouble. It is possible that some planters, especially those whose trees are set on hillsides, where erosion is a robber of fertility, would modify Mr. Burgart's practice of turning under the green crop in the spring. They might prefer, as indeed might others who would like to see their green manure nearer the top of the soil, to disk in the green crop rather than bury it deeply with mouldboard plows. They would of course follow it up with repeated diskings until the time came for sowing another cover crop. This is, however, entirely in line with Mr. Burgart's recommendations.

Pursuing this subject to its conclusion, we next asked: "When young trees failed to grow with you, what percentage of these failures was due to ..." (various causes enumerated below)? The question was misunderstood. Many evidently gave percentages of all trees planted. Others, correctly, gave percentages merely of the trees which failed to grow. As nearly as could be arrived at, about 30 percent of losses were among trees that failed even to start; 40 percent failed from weak growth the first year or two; 10 percent from failure to maintain later growth; 16 percent were winter killed, and 3 or 4 percent died from rodent or similar (mole, gopher, deer, bear) injury. It is evident that by far the greatest losses were suffered within the first two years—not less than seventy percent. Probably more. It would seem that two years of intensive care should not be too burdensome a stint for a reward which lasts a lifetime.

Rodent and similar injuries were no doubt kept low because of extra protective care. Hardware cloth (galvanized wire ¼" mesh, 24" high, preferred) around each tree proved the most common and effective preventive. Following this, in order of use, were: wrapping the trunks (including wrappings of tar paper); mounding with earth or ashes; poison bait, dogs and cats, clean cultivation; resinous paint; spray (with Purdue formula mentioned); and, finally, hogs, against mice.

Anti-rodent treatments which proved injurious to trees were reported to be; tar paper wrappings; coal tar washes; close-set creosoted posts; oil sprays; "any paint"; any chemical to smear on trunks; rooting cement. For those who are located in regions where deer are a source of injury, Mr. J. U. Gellatly, of West Bank, B. C., reports the successful use of an old and heroic Russian formula. Spray or paint all branches with manure water, using hog or human offal. Deer will stay away. Naturally.

Next come answers to some personal questions as to experiences from which the reader may glean a wide variety of suggestions. The first of these questions is:

"What is your ONE greatest source of success?" The answers seem to show many royal roads, each of which was the one road for someone. The answers: Mulching young trees; watering care; planting seeds; planting one-year seedlings; wrapping-with paper; 50% moist peat mixed with earth in transplanting; manure; sod in bottom of planting hole and use of nitrogen later; setting trees at bottom of slopes; clean cultivation until August then sowing rye, soy beans or cow peas as cover crops to turn under in spring; topworking hickories; grafting in cool, moist spring weather; pigs in orchard; chickens in orchard; planting 12-14-foot trees severely cut back, burlap wrapped, heavily mulched.

It seems a pity that limitations of space do not permit the telling of the various stories connected with the above glimpses of successful solutions. Each represents a little or a big success story connected with an individual problem. It is sufficient, perhaps, to know that someone somewhere found that each was the answer to his own difficulties.

The next question brings out the reverse side of the planters' work: "What is your chief source of failure?" The answer most often given was the honest one, lack of attention. We can all convict ourselves here, either involuntarily or otherwise. Especially during this period of warfare, when so many have been taken away from their plantings and have been unable to get help, there is no question but that our trees have suffered. The next in frequency is "unsuitable soil." Following this come: lack of water; poor planting; planting too big a tree; spring planting of nut trees; buying 5 to 7 year-old trees; climate; transplanting failures; grafting; grafting in dry, hot, springs; top-working old trees; stink bugs on filberts (nuts); lack of drainage; forcing with nitrogenous fertilizer; fertilizing young trees too much; birds breaking off top growth. It had been the intention to confine this question to young trees, but it was not so phrased, so we shall let the answers stand as they are. It is a bit ironical that some found their chief source of failure exactly where others had made their best success. The explanation must lie in differences in technique, in soil or in some other local condition. Skill, knowledge, and persistence must always play a great part in any success.

We next asked, "What have been your chief difficulties with established, bearing trees?" The difficulties here shift from matters of soil, rodent protection and the like to other types; caterpillars, neglect, winter injury, limited crops, failure of nuts to fill, disappointing quality of nuts, bag and tent worms, blight, "blight" due to drought, too early leaf fall, insects in early spring, trees drowned out in flooded bottom lands. It is probable that this last disaster happened to younger trees.

As to the species of trees chiefly damaged by these causes, black walnut comes first (possibly because more of these trees have been planted), then hickories, Persian walnuts, chestnuts (blight), heartnuts, pecans, filberts, butternuts, and finally butternuts in the south areas from fungus troubles.

Trees reported to have been least damaged were, first, butternuts, then hazels and filberts, black walnuts, hickories, Manchurian walnuts, Jap. walnuts, heartnuts, chestnuts, pecans, Persian walnuts.

In response to the specific question, "What insects damaged the trees?", we found that walnut caterpillars were more common than any others, followed closely by web or "tent" worms. The Japanese beetle is a close second and is broadening its entrenched positions steadily. Others are flat-headed apple borers, lace-wing fly, aphis, leaf hoppers. To this list two reporters added sapsuckers among the insects. These birds would almost girdle some of the branches with punctures.

Insect damage was reported as serious by eight reporters, as slight or occasional by six, and of yearly occurrence by nearly all. Others reported damage as serious if not controlled.

"What do you do to control the insects?" was then asked. Most of the answers referred to clustering types of insects and involved removal of the clusters by burning, by cutting off the infested twigs, or by scraping off the clusters from the trunks in the early morning or late evening. Others sprayed with lead arsenate, "sprayed in late summer with lead arsenate", sprayed with nicotine sulphate for aphis and lice. Other methods mentioned were early cultivation, shaking the tree with a pole early and often, and chickens in the grove. Some of these means are adapted manifestly, to small plantings and others to larger groves. None mentioned the attracting of birds by plantings of trees or shrubs that bear berries or small seeds. When trees are tall enough to be beyond reach of poles or sprays, the birds become more essential as insect destroyers.

"What insects damage the nuts?" Weevil, by long odds. Next come husk maggots or "shock worms", codling moth larvae, borers, stink bugs on filberts, butternut curculio. No cure is given for this trouble except the very valuable one of keeping chickens, or, better still, turkeys running freely in the plantation. Clean cultivation will, of course, destroy many larvae that hibernate under trash.

"What species are most injured by disease?" None are immune, apparently, though three reporters in favored regions answer "none" are injured. Black walnuts suffer from leaf-spot, blight, or canker, especially in seasons when the trees have been weakened by drought. Hazels and filberts are next, then Persian walnuts, butternuts, native chestnuts, Chinese chestnuts, pecans.

Blight in chestnuts, nectria canker and blight in black walnuts, blight in filberts (Cryptosporella), scab in pecans, and die-back Melanconium oblongum in butternuts. These are the kinds of diseases most to be feared among nut trees. Sprays, chiefly with Bordeaux mixture and copper base solutions, are recommended. If nut orchards were generally as well sprayed as apple and peach orchards, we should hear less of disease among nut trees. As it is, nut trees are in general far more resistant by nature to disease than fruit trees, but it will not do to take unlimited resistance for granted. As progress is gradually made in the selection of varieties for better nut production, it is very likely that there will be a weakening of this resistance to disease. Better cultural methods, resulting in more robust growth, will build up resistance. Better sprays and more spraying will act as a barrier not only to disease but to most insect enemies as well.

"What disease, if any, affects the nuts?" Fortunately, very few diseases are reported. "None," say most of our reporters. A scab is reported for the first time this year in some sections on pecans. "Galls" are reported on some hickories. A husk blight appears to affect Persian walnuts in some places, and nut production is very seriously affected among black walnuts by defoliation prematurely, either because of drought or leaf-spot. The cure is undoubtedly the same as for disease affecting the trees, namely spraying.

"What proportion of nuts are taken by the squirrels?" The answers to this question range all the way from "all if allowed" to "none if prevented." If the nut trees are located near a forest, the proportion will be large; if not, much smaller. Most correspondents say that the proportion is very small, but nearly a third of those who make any report on this at all, say such losses are rather heavy. In the extreme north, there seem to be no squirrels to bother. Several report thefts, particularly of filberts, by chipmunks, while one complains about both mice and jaybirds as filbert lovers.

The most effective squirrel control is the rifle or shotgun. Rat traps, using black walnuts as bait, are second choice and said to be effective. The banding of isolated trees with tin (one says cotton batting) will prevent squirrels from climbing. A good cat or several of them will be useful, say several reporters. One judicious correspondent says that, in general, there are two popular ways of handling the situation; one by shooting, the other by cussing—most practiced, least effective. One grower, not to be outdone by the patient Chinaman or Japanese, in September ties up each chestnut burr in a cloth sack. Take your choice; but it will be well, if you wish to remain in good standing with the law, either to do your shooting during the open hunting season or, if at other times, catch your thief in the act and, wastefully, let him lie where he falls when shot. So says the law, at least in some states. On the other hand, there are many who will say, with one reporter: "I do nothing about it. I like squirrels." [This note by chairman—not W. C. D.!]

The Marketing of Nuts! The purpose of this section was not to inquire into methods of marketing but merely to determine, if possible, what marketing of nuts is now being done. It is little enough. Chestnut lovers have all but forgotten the taste of good chestnuts. Black walnut buyers, confectioners, bakers, report that it is next to impossible, at least for the duration of the war, to get deliveries of nuts, especially shelled nuts. The market for a good product is best only when the product is easily and plentifully obtainable.

Forty-one growers reported that they sell nuts commercially. The others do not because they have no surplus to sell. Only six sell kernels. The others sell whole nuts.

Owing to a misreading of the question, few reported on profitable varieties. Those who did, reported Thomas as first, then Stabler and Ohio. Of pecans, Major first, then Greenriver, Busseron, Indiana, Niblack. Of chestnuts, Hobson is the only one mentioned, and of filberts only the Jones hybrid. Most growers reported on species instead of varieties. Of these, black walnuts stand first, then pecans, chestnuts and filberts. In the far northwest, filberts stand first. Most growers have the feeling that the hybrid chestnut, mollissima x dentata, is coming fast and offers one of the best chances for profitable commercial planting. At present only three reporters who specifically commit themselves on the subject say they count upon the sale of nuts as an important item in their income. Fifty-one do not. Fifteen definitely expect, and sixteen others have hopes, that nuts may some day become, at least to an extent, good income producers for them. Practically all express themselves as willing to sell or exchange either nuts or cions for propagation purposes.

Discovery of Promising Nut Trees. Some thirty-odd "wild" trees which bear nuts of unusual promise have been reported by discoverers in their answers to this survey. It is more than likely that some of them have been previously reported. The committee has no means of knowing. However, it is hoped that, out of the lot, one or two may be good enough for propagating or for contributions of pollen for cross-pollination. The names and locations of the owners of these trees have been turned over to Mr. C. A. Reed, Associate Pomologist, U. S. D. A., Beltsville, Md., for further investigation. It has been found that such information should not be prematurely published, since it leads to trouble for the owners and to possible undue valuations being placed upon the trees in question.

RATING OF VARIETIES. First, it will be best to state how the committee arrived at a rating. Certain well-known varieties were printed by name, and blanks were left to be filled, if desired, with names of special favorites of the reporter. Those listed by name were not all good, but were widely planted. We wished to know exactly what the planters' experience had been not only with the better varieties but with other old stand-bys which were suspected of being below standard.

We asked reporters to mark their sheets with the following scale symbols: XXXX for best; XXX, very good; XX, good; X, average. O, poor; OO, failure. In tabulating final summaries, the committee valued the XXXX symbol at 100%; XXX, 75%; XX, 50%; X, 25%; O, O%; OO, minus 20%. Twenty percent was arbitrarily deducted from any 100% rating, and 10% from any lesser rating, in case no other reports on the same tree were received from other reporters.

Qualities upon which ratings were made were hardiness, average yield (rating), yield in pounds per tree or acre, age of oldest trees, age at first crop, percentage filled nuts, husking quality, cracking quality, size of nuts, weight of kernels, quality of kernel.

Naturally, not all reporters were able to evaluate all of these qualities, so many spaces were left blank. For instance, hardiness could be rated for a very young tree, but not yield. In any future survey, we should advocate including a rating on early maturity of nuts, since this is a quality essential in trees planted farthest north.

Black Walnuts. Six names of well-known varieties were printed upon our sheets and, of course, most of the reports are centered around these trees. Twenty-four varieties were voluntarily written in and reported on by correspondents. No doubt some of these varieties will in time replace some of the older ones. Reports on them are now too scattered and too much uncorroborated to enable us to do them justice here. For the present we shall have to content ourselves with those which have sufficient evidence.

Of the printed list, Thomas takes first place with rating of 80.1%, which is a cumulative percentage of all percentages earned on the most desirable black walnut qualities. The method of obtaining this Thomas overall percentage is as follows: Add all the Thomas percentages in the paragraph below. Their average will be found to be 78%. Reports from Canada and the southern area bring this average up to 80.1%, as stated. Stambaugh is second with a rating of 72%. Rohwer rates 76%; Ohio, 57%; Stabler, 49%, and Ten Eycke, 45%. The last three seem to stand in jeopardy of replacement by other varieties.

Breaking these percentages down according to their qualities, the trees in the northern U. S. area were rated as follows, using the valuations noted in the second paragraph at this section entitled Rating of Varieties: In hardiness Thomas rates 80; Stambaugh, 70; Rohwer, 75; Ohio, 70; Stabler, 60; Ten Eycke, 65. In yield, Thomas rates 61%; Stambaugh, 39; Ten Eycke, 38; Rohwer, 37; Ohio, 36; Stabler, 13. Yield per tree or per acre was not well enough reported to warrant reliable ratings. In percentage of filled nuts, Thomas rated 82%; Stambaugh, 88; Rohwer, 91; Ohio, 87; Stabler, 67; Ten Eycke, 68. In husking quality, Thomas, 71%; Stambaugh, 67; Rohwer, 66; Ohio, 7; Stabler, 21; Ten Eycke, 13. In cracking quality, Thomas rated 81%; Stambaugh, 79; Rohwer, 57; Ohio, 57; Stabler, 61; Ten Eycke, 50. In size of nuts, Thomas rated 92%; Stambaugh rated 57%; Rohwer, 58; Ohio, 55; Stabler, 39; Ten Eycke, 42%. In weight of kernels, Thomas rated 79%; Stambaugh, 87; Rohwer, 62; Ohio, 55; Stabler, 50; Ten Eycke, 31. In quality of kernels, Thomas rated 77%; Stambaugh, 58; Rohwer, 60; Ohio, 68; Stabler, 44; Ten Eyck, 47.

It would have been more accurate, of course, to have again divided these returns according to the warmer and cooler regions from which they came, but the report has certain limits which can not be over-stepped. All these varieties are represented by some trees twenty years old or older. Thomas was reported to be the youngest to bear. Its average age at first crop was exactly five years; Stambaugh, 6 years; Rohwer, 5.57 years; Ohio, 5.17; Stabler, 5.7; and Ten Eyck, 5.17 years.

Other varieties, the names of which were written in, are each sponsored by one or more correspondents who were attracted by their outstanding excellence with respect to the following qualities:

Hardiness: Creitz, Homeland, Mintle, Elmer Myers, Tasteright, Pinecrest, Patterson, Horton, Vandersloot, Lamb, Deming Purple, Brown, Tritton, Cole, Sifford and Korn.

Yield: Creitz, Homeland, Mintle, Cozad, Vandersloot, Brown.

Filled Nuts: Homeland, Mintle, Cornell, Niederhauser, Cozad, Vandersloot, Brown, Tritton, Cole, Sifford.

Husking Quality: Creitz, Homeland, Mintle, Patterson, Todd, Snyder, Cozad, Horton, Vandersloot, Lamb, Deming Purple, Brown, Tritton, Cole, Sifford.

Cracking Quality: Eureka, Snyder, Mintle, Patterson, Brown, Tritton.

Size of Nuts: Homeland, Todd.

Weight of Kernels: Mintle, Todd, Snyder, Cornell, Niederhauser.

Kernel Quality: Creitz, Homeland, Mintle, Korn, Snyder, Cornell.

This, of course, cannot be a complete list, but we give it as reported to us. It will be well to keep an eye on several of them.

Mr. L. K. Hostetter, Lancaster, Pa., sends us the only report which gives a year-by-year record of nut production from black walnut trees. He says:

"I am especially interested in persimmons, service-berries, wild cherry, mulberry and elderberry. Of about 15 varieties of persimmon here I consider Early Golden and Josephine the best. Of 20 or more varieties of mulberries I consider Downing and Paradise the best. Paradise is a large purple mulberry I found near here. It has an exceptionally good flavor.

"Following is a record of my crops of black walnuts, grafted varieties: 1931, 2 bu.; 1932, 3 bu.; 1933, 4 bu.; 1934, 8 bu.; 1935, 12 bu.; 1936, 18 bu.; 1937, 37 bu.; 1938, 54 bu.; 1939, 52 bu.; 1940, 300 bu.; 1941, 20 bu.; 1942, 125 bu.; 1943, 70 bu."

Mr. Hostetter sells his nuts both as kernels and in the shell. He says that he can now count upon this crop for a substantial contribution to his annual income.

Seedling Chestnuts. None but Chinese and Japanese varieties were reported on. More of the Chinese seedlings have been planted than of the Japs. The latter excel in hardiness, yield, size of nuts, but the Chinese have a better percentage of filled nuts, have better husking quality and much better quality of kernel, according to growers. Of course, being seedlings, neither is entirely dependable in any of these qualities. The best that can be said is that the planter of a Chinese seedling has a better chance than the planter of a Jap seedling if he is after nut quality.

Named Chestnuts. Outside of the report on hardiness, the returns on these varieties are too meagre to enable one to arrive at a corroborated conclusion. In hardiness, the Hobson stands first with a rating of 95%. Zimmerman and Carr are tied at 60%; Yankee rates 50%. Reliable seems to be little planted but also seems to rate well in hardiness. Hobson again stands first in yield, with Carr and Zimmerman second. The ratings are 80% and 60% respectively. Reliable comes next, then Yankee. In early bearing, Hobson stands first, Carr next. All seem to fill well, also have good husking quality. Carr is said to bear the largest nut, with Hobson and Zimmerman next. In quality of kernel, Hobson and Reliable stand out from the others. Hobson, on the returns, has much the best of it in general excellence. However, the last word has by no means been said in connection with hybrid chestnuts. In no field of nut culture is so much hybridizing being done. We expect to see many contenders for preeminence in this most promising branch of the industry.

Pecans. The returns on pecans are also very incomplete after we go beyond the young tree age. Perhaps one reason for this is that young orchards of pecans require a longer time for growth than many other species before they begin to bear. The reports confirm this view. Records of crops from present plantings are none too numerous.

In the reports on hardiness among the pecans, Major stands first with a percentage score of 85; Greenriver 83; Busseron, Indiana and Giles are tied at 80; Posey 75; Butterick 40.

Records of yields are not numerous enough to be conclusive, but Major, Busseron and Butterick lead. This is in the absence of reports on Greenriver, Posey, Niblack, and other important varieties.

Hybrid Pecans. The records for hardiness here, as with other pecans, are marred by lack of good reporting. So far as the record shows, Pleas—Hican var. (hickory x pecan) is the outstanding variety for hardiness in regions north of its origin. It scores 85%; Norton and Rockville, 80% each; Gerardi, 75; Burlington, 60; Bixby, Des Moines and McCallister, 50% each.

Records of yields are not forthcoming. Such records as we have of filled nuts show them to be in general, unsatisfactory. In fact, however, no reliable conclusion can be reached from a study of the pecan reports unless it should be—a sad one—that the questionnaire or the questionees fell down here.

Filberts. The story brightens. Many are working with filberts. In the northwest, the growing of filberts is developing into a commercial enterprise of good proportions. Our records are correspondingly more complete though they show that there is plenty of room for improvement in the development of varieties of desirable quality.

In hardiness, Winkler leads in the reports with a score of 71.46%, with Jones hybrid a very close second at 71.15%. Bixby is next, then Buchanan. Of the "written-in" varieties, excellent hardiness is reported for Cosford, Hazelbert, Kentish Cob, Early Globe, Burkhardt's Zeller, Comet, Gellatly No. 1, Chinese Corylus, Brixnut and Longfellow.

Yields rule best with Rush and Jones hybrid. Winkler, Bixby and Buchanan follow closely. Failures in this respect are noted for Barcelona, DuChilly, Italian Red and White Aveline. Cosford has a good report.

Rush and Jones hybrid fill well, as do Cosford, Hazelbert, Buchanan and, usually, Winkler. Husking qualities are quite good for all varieties named except Winkler and, in some places, Rush. Cracking qualities are fairly uniform in all varieties reported.

In size of nuts, Jones hybrid and Winkler have a more uniformly good record, with Hazelbert, DuChilly, White Aveline, Barcelona, Brixnut and Longfellow following closely. In kernel quality, Rush, Winkler, Cosford, DuChilly, Bixby, Buchanan and Longfellow are named as among the best.

Butternuts. The record is very scant. Weschcke, Sherwood and Buckley, according to these reports, are hardy. Weschcke and Craxezy yield well. Sherwood is the most precocious in early bearing with Weschcke close up. Sherwood, Craxezy and Weschcke fill well and the latter two crack well. Buckley leads in size of nuts, with Sherwood close, and all have good kernel quality. We have no reports on Aiken, Deming or Devon.

Persian Walnuts. In most portions of the north, the reports show that Franquette, Mayette, Pomeroy and Rush are not adapted to our climate—too tender. Broadview has the best record for hardiness, followed by one or two of the Crath Carpathian numbers, and with Breslau, Lancaster and Bedford showing up well.

In yields, Broadview and Payne have the best reports, followed by Breslau, Lancaster and Bedford. In size of nuts, Breslau, Lancaster and Franquette are first; Broadview and Payne next. In quality of kernel, Bedford, Franquette, Lancaster and Payne, in that order, are claimed as best, with Mayette, Breslau, Crath, Pomeroy and Broadview following. Since kernel quality is a matter of taste, it seems unlikely that any rating on it will prove satisfactory to everybody.

Hickories. Returns are numerous and well distributed. In hardiness, Stratford leads with a rating of 84%; Glover rates 83; Fairbanks, 79; Romig, 75; Weiker, 71; Kentucky, 65. Others, written in, with best ratings by their growers, are, in the following order; Beaver, Hales, Barnes, Clark, Caldwell, Taylor, Weschcke, Beemen, Bridgewater. Schinnerling, Hagen and Abscota are close up.

Best yields are reporting for Stratford and Fairbanks. Close up are Barnes, Glover and Schinnerling.

Weschcke, Glover, Weiker, Beeman and Bridgewater are most precocious in early bearing. Best filled nuts are reported, in order of precedence, for Stratford, Fairbanks, Walters, Beaver, Hagen, Weschcke, Beeman and Bridgewater.

Husking quality: Reports were inadequate. Cracking quality, in order or rank, Glover, Stratford, Hagen, Beeman, Weschcke, Schinnerling, Kirtland, Weiker, Bridgewater.

Size of nuts: In order of rating, Weiker, Bridgewatar, Fairbanks, Weschcke, Stratford, Beeman, Schinnerling, Hagen. In weight of kernel: first, Abscota, then Barnes, Glover, Fairbanks, Kentucky, Kirtland.

Quality of kernel: In order of preference, Kirtland, Glover, Weschcke, Hagen, Stratford, Bridgewater, Weiker, Abscota, Schinnerling, Kentucky, Beeman, Stratford, Beaver.

Too much dependence should not be placed upon the order of precedence in the above lists after the first two or three, since, in many instances, there is not sufficient corroboration from separate sources to warrant more than a tentative position, especially for some of the varieties listed at the ends of the classes.

Heartnuts. The hardiest, in the order reported, are Walters, Fodermaier, Gellatly, Faust, Bates. Lancaster, does not bear well and is not hardy in the northern areas. Best yields reported are from Walters and Bates. Other reports are inadequate or absent. Most precocious, Bates and Gellatly.

Best filled heartnuts, with best husking and cracking qualities as well as best quality of kernels; returns are about equally divided between Gellatly, Walters and Bates, with Walters and Gellatly somewhat larger in size.

It is to be regretted that reports are incomplete or absent in connection with many varieties of nuts. We feel, however, that, in the main, the above ratings, especially when arrived at from cumulative evidence, reflect with fair accuracy, the present status of nut tree conditions in northern United States.

CANADA. In all its chief characteristics, the Canadian nut growing experience follows the pattern of northern United States. The reports received from Canada numbered about one-tenth those received from the northern states—upon the whole, a satisfactory cross section.

In summarizing these reports it will be necessary only to call attention to such practices and experiences in Canada as are at variance with those already reported from the northern states. For example, in response to the question, "What species are you planting experimentally or commercially?" we find, surprisingly, that Persian walnuts displace black walnuts from first place, at least in these reports, and that filberts and heartnuts come next. Then come black walnuts, butternuts, hickories, hazels, Chinese chestnuts, persimmons, Jap walnuts, almonds and a scattering of other species. Leading native wild trees are, first hazels, then black walnuts, hickories and butternuts.

Winter climate is widely varied, being temperate along Puget Sound and close to the southern tier of the Great Lakes, but subject to great extremes in the prairie provinces. Lower winter temperatures in these provinces average from zero to 45° below, while the lowest recorded is reported to have been 62° below. It is evident that Canadians have widely variable problems, in spite of which three Canadians, exactly the number reported from the northern states, tell us that the sale of nuts is an important item in their annual incomes. It looks as though, in comparison, northern U. S. growers could do better. With an average frost-free season of less than five months (from May 7 to Oct. 2), Canadians do this. The normal dates of latest spring frosts average from April 20 to May 24, and of earliest fall frosts, from Sept. 10 to Oct. 12. Extremes at either end often shorten the season somewhat.

Soil conditions are generally good, with plenty of loam and sandy-loam, half lime, half acid; but drought is serious in places, necessitating irrigation. One wonders whether, if more of us were pushed to it, we might not find irrigation so profitable that we would never again be without it. Cultural and soil corrective practices are, in general, similar to those previously reported. Less trouble is experienced from rodents—mice, rabbits, squirrels—but more from deer. Wrapping the trunks of young trees is more generally practiced than with us of more southern latitudes, and disk cultivation is more generally favored.

In reply to the question, "What was your one greatest source of success?", the answers include, pollination by hand, the use of good trees, disking, planting hardy seed, and budding Persians on black walnut stocks. Failures were due mostly to the inevitable causes, cold, drought, weak growth. Alkaline soil is mentioned in one report as a chief difficulty. Bud worms, June beetle, leaf hoppers and walnut caterpillars are also enemies, but Canada seems free from some of the other pests that have invaded the United States.

The most profitable species reported by Canadians are filberts, black walnuts, with "soft-shelled" walnuts mentioned by Mr. Gellatly, of West Bank, B. C. From Ontario, Mr. A. S. Wagner, of Delhi, writes, "We are collecting (nuts) now to make tests of various types of black walnuts this winter. There are one or two plantations of 1000 trees which will soon be bearing, and the future looks interesting."

Black Walnuts. Four varieties appear in Canadian reports which have not been mentioned previously: Impit, Troup, Gifford and Neilson. Gifford and Neilson are said by Mr. Corsan, of Ontario, to be heavy croppers in Canada, Neilson "Very heavy." Impit is a splendid, upright-growing tree which should do well for timber production as well as for nuts. All trees printed in the questionnaire, Ohio, Rohwer, Stabler, Stambaugh, Ten Eyck and Thomas, are given "good" ratings for hardiness except Thomas which is fair. Gibson bears large nuts of good cracking quality.

Neither Japanese chestnuts nor pecans are reported on from Canada. Chinese chestnuts and hybrid chestnuts are reported as planted and hardy, thus far, but have yet to bear.

Filberts. Holden, Craig, Firstola, Comet and Brag show up as hardy and bear good crops of nuts of good quality. Other promising varieties are Petoka (new variety, small, thin shell,) Daviana, Churchvelt—significant name! Barcelona, DuChilly, Italian Red, Rush, White Aveline and Bixby are reported to be not hardy. Winkler is hardy. Mr. J. U. Gellatly, of West Bank, is working with a number of tree hazels, Chinese, Indian, Turkish and a cork-barked variety. All are rated by him as hardy in his area. They are young trees, not yet reported in bearing.

Butternuts. In addition to previously named varieties, Edge is added and is given a foremost rating in all departments, The rating on others is not conclusive.

Persian Walnuts. No new light is thrown on the performance of varieties already listed. Broadview is one of the hardiest, a good producer of fair nuts. Watt produces a large nut of finest flavor. Geloka is a good nut, and Corsan is hardy but bears a smaller nut of lesser kernel quality.

Hickories do not seem to interest Canadians. Stratford, first, and Weiker, second, are leaders. Stratford bears heavily but its quality in Canada is not up to par.

Heartnuts are a Canadian specialty. Gellatly, of all varieties in the printed list, is reported as best in all departments. Of the twelve varieties written in by reporters as worthy of special mention, it is difficult to make a just appraisal. Okanda, O. K., and Crofter are reported perfectly hardy through minus 20° of cold. Others, hardy and good in all departments, are, Mackenzie, Canoka, Walters, Rover, Calendar and Smyth. Stranger seems not quite so hardy, but Mr. Corsan calls it "the best heartnut grown", splendid in flavor, thin shelled, a little small but with a better than usual percentage of kernel.

If heartnuts have a future, which seems almost inevitable, it looks as though Canada, if it continues as it has started, will be one of the main sources of supply for varieties. The Canadians are doing a creative job.

THE SOUTHERN AREA. There are no nurserymen who report from the southern area. Practically all are interested in the production of nuts, but they are more alive than their northern neighbors to the value of timber, and more of them count upon it for a part of their profit from the planting of nut trees.

Interest is about equally divided between methods of propagation, grafting, budding, top-working, planting seed of better varieties, artificial cross-pollination, and searching their neighborhoods for wild trees that show promise of superiority.

The species being planted experimentally or commercially are, in order of precedence, black walnut, persimmon, pecan, Persian walnut, Chinese chestnut, hickories, filberts, hazels, heartnuts, Jap chestnuts, almonds, mulberry, native chestnuts, Jap walnuts, pawpaws and beech. Species of wild trees found locally follow closely the pattern of planting mentioned above, which is as it should be.

Climatic conditions are, in-general, favorable. Peaches are in most places reliably hardy. Lowest temperatures normally expected range from 22° above to 20° below zero; and the highest normal summer temperatures range from 90° to 115°. Dates of normal late spring frosts have a very wide spread, being all the way from March 1 to May 12. Normal early frost expectancy is from Oct. 10 to Nov. 15. All long-season crops mature well. The chief climatic enemies are drought and hot, dry winds.

As to growth conditions, clay soils predominate, but with plenty of loamy bottom land for nut planting. Acid soils predominate somewhat over lime soils, growing more unfavorably alkaline in the south-west.

Cultural practices are generally the same as in the north, but with a greater proportionate use of mowing and mulching, no doubt induced by the need for protection against greater heat, as well as for conservative of moisture. A greater proportionate failure of young trees to start first year's growth is also probably due to heat injury in the spring and summer following planting. Tree wrapping seems to be the corrective chiefly indicated.

The difficulties principally mentioned with matured trees are again mostly climatic; drought, sun-scald, early advent of spring followed by late frosts, delayed dormancy in the fall, poor filling in dry seasons, and biennial fruiting.

Insect enemies which damage both trees and nuts are practically the same as in the north only there are more of them. Rodent damage and squirrel theft seem less troublesome there owing, perhaps, to protective measures and to the well developed hunting instinct among southern farm boys.

A larger proportion of growers than are reported in the north sell nuts commercially, with pecans, walnuts, and chestnuts listed as the most profitable species. The practice is still limited as an important source of income, but a much greater proportion of planters look confidently forward toward profitable operations in the future.

Black Walnuts. It is evident that in some of the warmer parts of the United States, California, for instance, the word "hardiness" takes on a certain connotation that we should understand better in the north. Its meaning there is "resistance to delayed dormancy", as one California report states it. As a matter of fact, it might be advisable for us all everywhere to think of hardiness in these terms. Delayed dormancy is hazardous in any tree, whether natural to it or induced artificially by late summer or early fall cultivation and fertilizing, and whether the tree is located in the north or in the south. When a tree goes into the winter with sappy wood, it is injured, and we say it is not hardy.

That this is true in the south as well as in the north is well attested by the returns on black walnut trees of the south. There, the tree gives us a picture surprisingly similar to that of the north. In the south, if the tree's dormancy is delayed, it does not get its proper rest between crops and it dies or is stunted, in one way or another, for some time thereafter. In the north, if the following winter is severe, it simply dies. Perhaps the winter killed it. Or perhaps we killed it with unseasonable pampering.

Reports show that in the south, Rohwer, Stambaugh, and Ten Eyck lead in hardiness in the printed list of black walnuts, with a score of 80% each. Ohio, Stabler and Thomas each average 75%. Of the written-in names, Sifford and Beck are reported hardy, followed by Creitz. Elmer Myers has only one report, which is rather unfavorable in this respect.

In yield, Creitz has the best rating, then Thomas, Stambaugh, Sifford, Stabler and Beck, in that order.

Thomas is the most precocious in early bearing. One report has it that Thomas kills itself, sometimes, by overdoing it in this respect. Stabler, Sifford, Creitz and Beck come next. All of these varieties are reported as having well filled nuts, with Stabler in the lead, which may come as a surprise to many. Other qualities, such as husking and cracking, size, and quality of kernel, are reported to be the same as in the north except that Stabler leads in cracking quality, with Thomas a rather poor second, owing, perhaps, to a shell too well filled for cracking without shattering the kernels.

Seedling Chestnuts. More Chinese chestnuts are planted than Japs. They are hardier, yield better crops, are more precocious, and have a far better quality of kernel. The Japs excel only in size.

Named Chestnuts. Hobson is hardy and an extremely precocious bearer of finest quality. Carr follows. Reports on these varieties, however, are not numerous enough to enable one to reach a satisfactory appraisal. Two Marron strains are mentioned as producers of very large nuts; otherwise this variety's record is not impressive.

Pecans. Posey and Greenriver are given top mention for hardiness, with Busseron, Major, and Niblack next. In the more southern areas, of course, the more tender varieties are favored, such as Mahan, Success, Burchett, Schley and Stuart. Mahan seems to be the one most favored for general excellence in yield, flavor, and cracking qualities. It must be said, however, that, in flavor, these larger pecans are inferior to the best pecans of the indigenous northern varieties which are now being propagated. But because of their size, beauty, and productiveness, they will probably maintain their present leadership commercially.

Hybrid Pecans, Filberts, Butternuts. Reports from the south are inadequate for appraisal. The inference one must draw is that they are not being planted extensively there.

Persian Walnuts. The object of the inquiry, of course, was primarily to get information about varieties which might be capable of expanding their range toward the north. In this, so far as the southern reports are concerned, we have not been successful. Placentia and Eureka are mentioned in one report but their records, as reported, are not particularly good. Corroborative evidence is needed. Upon the whole, the south, strangely enough, seems not to be the place to look for Persian walnuts for the north. In California, the varieties of Persians, Juglans regia L., are well rooted to the ground. They object to more northern locations. This may not be entirely true of another species, J. hindsii, which in the past has shown a tendency to cross with other members of the juglans tribe. Crossed with the native black walnut, the hybrid known as "Royal" was developed, a robust grower which bears little. Crossed with the Persian, "Paradox" was produced. We are indebted to Mr. Harry S. Welby, of Taft, Calif., for some interesting J. hindsii varieties of good size and rather large, well filled kernel capacity. Upon their exterior, the nuts resemble the Persians, and the kernel has the Persian flavor. Inside the shell, the structure is that of the American black, with a substantial woody cross-brace, and the shell itself calls for a hammer for cracking. Neither Paradox nor Royal have proved of value except for stocks upon which the growers graft or bud their commercial cions. Much experimenting has been done in hybridizing J. hindsii, thus far without producing more than comparatively sterile "mules", but, the tendency to cross having been demonstrated, this work should be continued. Mr. Welby's samples have been sent to Mr. C. A. Reed, at the Beltsville Experiment Station, for evaluation. "Perhaps someone will know," says Mr. Welby, "the limit of cold J. hindsii will stand."

Mr. Welby's comments accompanying his report are too interesting to omit. He says: "On the grounds of an oilfield camp, I have carried on collaboration with the U. S. D. A. Bureau of Plant Introduction for twenty years. The importation of graftwood of eastern soft shell black walnuts has been "on my own." Of black walnuts we have bearing trees among ornamental plantings. There has been a marked change of attitude from the early days when I was more or less looked upon as a freak for working with them. The nuts are valued today. The original objective has been attained.

"In the meantime, I have purchased, 450 miles north of here, a twenty; have fenced and planted it to a brand of permanent pasture grasses known as "Evergreen", furnished by a grass specialist, Dale Butler, of Fresno. Prior to the grass, black walnuts, grafted and ungrafted had gone in. A strip bordering the highway was reserved for trees, we hope pistachio. There are now thirty of that variety, bearing, in an interior block.

"We have for years purchased black walnut meats in the Chico area. That would be a paradise for a black walnut man. And years ago I visited Teharna, a deserted village from the storybook, a former pony express station—wonderful black walnuts! Upon placing my camera upon a stump of a tree that grew in the street-parking, which had been logged, I braced the camera with a chip of this four-foot stump and discovered that the tree had been a curly walnut. The trees there are not J. hindsii, but Missouri blacks planted by forty-niners.

"Concerning pistachio: I doubt, considering the percentage of members who would be interested, whether I should bring this up, but there is need for just such an organization as the N. N. G. A. behind this tree. It does not lend itself to common nursery practice. It should be raised from seed, potted or in cans, reared without babying for several years, a horticulturist brought in, and your pistachio vera male and female blossoms worked to P. atlantica or chinensis. Lots of work but it is worth the trouble. It is deciduous with a hickory-like foliage; clusters of nuts clothed in pink-cheeked hulls. Bailey reports best nuts come from Sicily. Perhaps knowledge of them will be more widely disseminated when the boys return."

Hickories. This species seems not to be of great interest to the south. The old varieties are not mentioned in the reports. Nugget is mentioned by Mr. W. D. Dockery, of Steele, Ala., as one of the best. It grows well, yields well, its kernels have a good size and their quality is unusually good.

Of heartnuts, only one is mentioned, the Lancaster, which leaves much to be desired in performance in the south.

Suggestions and Requests. In response to the questions, "Is there any service that N. N. G. A. could render you not now being met?" and "Have you any suggestions for future work?", a number of responses were received which are worth noting.

Dr. O. D. Diller, State Exper. Sta., Wooster, O., "We are thinking in terms of another state wide nut contest in the fall of 1944." It will be remembered that the last Ohio contest brought the Brown and Tritton trees to light. Both are making friends by good production of good nuts. This is a suggestion for promotion in other states.

Sylvester Shessler, Genoa, O.: "Planted 10 nuts from Tritton parent tree in 1935. One seedling bore a larger nut than the parent tree. Several others bore very small nuts but all well filled."

J. Russell Smith, Swarthmore, Pa., "Urge the members to run local contests for good nuts. It may bring members if not nuts, and you may find some good new neighbors you didn't know about." (One easily worked plan is to see the secretary of your county fair board, offer to pay half or all prize money for best nuts from a single tree in your own and surrounding counties. See that judging is done by someone who knows how or do it yourself.)

Alfred J. Frueh, W. Cornwall, Conn., "Have had quite a lot of winter injury on the south-west side of black walnut trunks grafted near the ground. Note that seedling walnuts have a ridged, corky bark on the trunk already the second year, whereas a grafted trunk maintains its smooth bark for 6 to 8 years. Am now grafting on seedling stock 5 to 6 feet above the ground and much of the winter injury is thus eliminated."

A. B. Anthony, Sterling, Ill., "If they can be had disease free, promote the planting of a few of the most choice chestnuts in widely scattered regions where no one grows such trees. Possibly our children can get back to chestnut growing."

Seward Berhow, Huxley, Ia., "In a separate (pamphlet) or included in an early report, give a complete list of all named varieties, especially black walnuts, name of nut, name and address of originator, location of original tree, north latitude, year discovered, nuts per pound, score for cracking, kernel, prizes won. This would be very valuable for quick reference." The T. V. A. has issued a pamphlet giving much of this information. Also, we believe, Mr. C. A. Reed is at work on a book which will be worth waiting for.

J. U. Gellatly, Westbank, B. C.: "Could not the Association supply samples of recommended nuts or perhaps give lists of those who would sell small (3 or 4) nut samples. I have sent out such samples of 2 or 3 each of varieties I have on hand up to 9 or 12 kinds, at 50 cents per package, post paid. This is not enough to pay for the time consumed but is a good advertising practice."

Harry S. Welby, Taft, Calif.: "The ground squirrel is a pest here. Black walnut as bait will attract them in winter when fruits are scarce. At that time I have had some success with a box trap treadled by an electric contrivance instead of figure 4. Can anyone tell me any experience with scent baits which I believe Biological Survey trappers sometimes use? It may be a delicate question, but I should be interested in knowing more if the information is available."

R. T. Dunstan, Greensboro College, Greensboro, N. C.: "I would be happy if this survey brings to light information on the behavior of the best and more recently discovered hickories. (If not,) I believe an article on performance of such varieties as Whitney, Grainger, Bergor, Davis, Wilcox, Schinnerling, etc., perhaps similar to that by Reed in 1938 Proceedings, would be highly valuable and welcome. Perhaps a report on T. V. A.'s nut tree work in recent years would also be worth while."

C. H. Parks, Asheville, N. C.: "Would be interested in a chestnut that will grow in southern Appalachian regions." (See Mr. H. F. Stoke's report above. Chairman.)

Harold G. Williams, Ramsey, N. J.: "I believe that most useful trees, both fruit and nut, that are now commercially important, were developed from selected seedlings grown in the area in which they are being used. I have a suggestion. How about a concerted breeding program for nut trees with full membership participation? The best parent trees should be selected from present plantings of grafted, named varieties. Ship these seeds, or one or two year old seedlings from them, to each member on a subscription basis. Let each member make a trial planting of as many trees as he can. When these trees come into bearing there will be a better chance of finding superior strains that are adapted to their environment. Hybridizing by cross pollination requires more time and skill than many of our members possess. There are, however, members who now own orchards containing some of the best varieties, such, for instance (among the black walnuts) as Thomas, Stabler, Stambaugh, and perhaps Elmer Myers, planted in such close proximity as to allow for cross pollination. Seed could be purchased from them and resold to members for their planting; costs to be kept fairly low, with annual reports required as to care, cultivation, fertilizing and growth.

"An alternate plan would be to turn over such seed to Hershey, Smith, and other member nurserymen to plant, grow the young seedlings under best conditions, and furnish to member cooperators whose pledged subscriptions are to take care of the cost. This would give the cooperating nurseries a piece of business that could be depended upon (of a kind that would take comparatively little time as compared with that required for grafted trees), in return for their support. These trees could be planted fairly close, since most of them would prove to be useless as nut producers. If an outstanding variety is found, everything around it should be chopped down to give it room for development. I personally would raise and report upon some two dozen trees of this kind, and if a large group joined in the work, hundreds of tree could be tested."

Comment: That the chairman of this committee thinks the above suggestion a good one, and the project a good gamble, is evidenced by the fact that he has about a thousand of such trees now growing. Seed was bought from Mr. Harry Weber's, Rockport, Ind., and Mr. C. F. Hostetter's Bird-in-Hand, Pa., plantations in the fall of 1937 and planted at once. Most of the seed was from Thomas trees which had been flanked in the plantations with Stablers and other named trees, and from Stablers similarly flanked. The trees have now had six years' growth. He hopes for first nuts in 1944 from seedlings planted in deep loam only. Growth elsewhere has been negligible. If no outstanding nut producers are found, there will at least be some splendid timber, already assured.

It should be stated at once, however, that those whose object is the assured production of nuts, rather than the discovery or development of a new variety, should never plant anything but the best grafted trees bought from reliable nurserymen. Your decision should be governed by your interest. If you wish to be sure of nuts of a certain quality for home use, buy grafted trees of that quality. If, on the other hand, you have the urge to probe into the unknown and possibly create a new type, the above project will appeal to you, especially if you should lack training and time for more painstaking work. The following account is an example of the latter kind.

Arthur H. Graves, Curator, Brooklyn Botanic Garden, says: "We are breeding chestnuts for the purpose of obtaining a disease-resistant timber tree stock similar to the old chestnut tree which has now nearly disappeared on account of the blight. We started breeding chestnuts here at the Botanic Garden in 1930, and now after thirteen years of work, have on our plantation at Hamden, Conn., Litchfield, Conn., where the White Memorial Foundation is cooperating with us, and Redding Ridge, Conn., where Mr. Archer M. Huntington and the Connecticut Agr. Exp't Station are cooperating, about 1000 hybrids, a large number of combinations of Chinese, Japanese and American chestnuts, many of them now in the third generation from the beginning of the breeding period in 1930.

"We are carrying out our breeding program in the following way:

"We have selected the Chinese and Japanese species to cross with the American because the Asiatic species are disease-resistant, and we hope to incorporate this quality of disease-resistance with the tall timber growth of the American. We find that the Chinese are in general more disease-resistant than the Japanese. Other stocks which have been incorporated in our hybrids are the European C. sativa, the southern chinquapins C. pumilia, C. ozarkensis, C. floridana, and Dr. Van Fleet's old hybrid, presumably of C. crenata and C. pumila, which goes under the name of S8, and C. seguinii. After the hybrids become old enough, we inoculate the tallest of them with the blight fungus in order to get an index of their disease resistance. The most disease-resistant are bred together and of their offspring the tallest are selected, inoculated, and the most disease-resistant are bred together again. For example, this year we had 350 hybrids from last year's breeding experiments set out in a special nursery at Hamden and carefully tended during the season. Of these 350 we have selected 50 which are the tallest and straightest, that is, 20 inches and over. The others were sent to Washington, D. C., where the Division of Forest Pathology, Department of Agriculture, is working along a similar line, but with more attention to the nut phase of the problem.

"Our ultimate aim, of course, is to establish a race of chestnut trees which shall replace our now practically extinct American chestnut. The loss in money value from this timber tree has amounted to millions of dollars in comparison with which the value of its nut crops is very small indeed.

"However, we are interested in the nut problem, and whenever any particularly fine nuts appear we note the fact. We have now a strain of Chinese chestnut which has not yet come into bearing which we believe will have nuts as sweet as the old American chestnut, but much larger."

With this forward-looking note we close our report. We have a foundation upon which to build that is substantial and tried. The pioneering work of a patient, far-sighted, and distinguished group of workers has shown us much of what to do and what not to do. It is now up to us, the farmers, the planters, to multiply their work and continue it.

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Side-lights on the 1943-4 Survey

Very many interesting bits of information have been included in the survey reports; so many that the committee has regretfully omitted some that hardly seemed properly to belong with the material of a survey, which after all must have some limits. One such item is from J. C. McDaniel, of Haines City, Fla., and has a special interest for members of this Association. He says:

"Perhaps you will be interested in data on one of America's largest Chinese chestnut trees, even if it does grow in Florida, at Monticello. It stands adjacent to a lot in which the late J. F. Jones had a nursery for a short time in the early years of this century, and apparently was planted at that time, around forty years ago. The trunk is now more than 25 inches in diameter below where it divides 6 feet above the ground. From this level, the tree branches profusely and has a symmetrical, rounded crown. It is healthy, not having a sign of the bark disease, although a native chinkapin 100 feet away is badly infested. It has abundant bloom and sets heavy crops of burrs but, lacking another variety for pollination, the number of nuts matured is small. Nuts are about average size for the species, of typical sweet flavor, and separate readily from the pellicle. Many of them become infested, before ripening, with a fungus which rots the kernel, apparently the same one which infests chestnuts and chinkapins at Savannah and Albany, Georgia. Mr. Paul Goldberg, of Monticello, the present owner, states that the tree has been bearing annually during the twenty years his family has owned it."

This nut-rot among the oriental chestnuts is one of the diseases that have become troublesome elsewhere. It is being studied and efforts are being made to combat it. Thus far, so far as we know, no effective cure has been found. A report upon present progress would be worth while.

Oscar E. Swan, Jr., Tulsa, Okla., reports an enviable situation. He says: "My nut trees are growing on a farm where more than 30 years of cultivation have failed to kill the native pecan sprouts. They come up year after year from the top roots. Since acquiring the place in 1936, I have allowed the pecan sprouts and the few native walnuts to grow unchecked except where necessary to cut them out to avoid crowding. The growth of these sprouts is quite vigorous, and they are ideal for top-working. I have top-worked a few trees every spring and now have about 300 grafted trees all the way from 6 to 30 feet tall. Many are too close together for full grown trees and I plan to thin them. My problems, so far, are the mechanical ones of top-working. I have settled upon a modification of the Biederman bark graft, which gives very good results. After the grafts are well established, the trees get very little attention except for cutting out the crowding trees. They are literally growing 'wild', yet the growth has been better than transplanted trees would have made with the best of care, because the root systems are well established in a situation which suits them.

"This system of neglect probably explains why I have failed with some species and varieties such as the butternut and some of the hickories. Occasionally I am pleasantly surprised, as in the case of some seedling Carpathian walnuts which, grafted upon some established black walnut sprouts, came through the severe 1943 drouth in fine shape without benefit of mulch, cultivation, fertilizer, or watering. The same applies to the Helmick hybrid. (A two year old tree, a hybrid walnut, grafted and growing well on black walnut stock, and which Mr. Swan says will bloom next year.) I have pampered my Chinese chestnut trees with cultivation, mulch and manure, as they are located in poorer, drier soil. They were badly hit by the drouth. Some died in spite of the attention.

"As to varieties, I am far enough south to grow all the standard southern pecan varieties, although several do not have a long enough season to mature their nuts. I am trying the northern varieties and, so far, am well pleased with their growth as compared with the southern kinds. It will be a few years before I can report on the size and quality of their nuts."

J. C. McDaniel again: "Source and variety of seed in Chinese chestnuts have a great influence on the performance of seedlings. Numerous seedlings from the original Hobson tree began fruiting in their second season of growth, and half of the ones I have are fruiting during their fourth season. On the other hand, I have a tree from imported seed which grew nine seasons before setting and ripening its first burr. The above data refer to my planting near Hartselle, Morgan County, Ala., and that vicinity. I have several black walnut trees under observation, native trees, on which data are not yet complete enough for evaluation."

If any man deserves a bright N. N. G. A. medal, it is A. L. Young, of Brooks, Alberta. Lowest temperature expected in winter, 45° below; lowest known, 62° below. Highest expected in summer, 101°. Frequent drouths? Yes. Hot, dry winds? Yes. Native nuts found plentifully? None. Sparingly? None. Yet Mr. Young plants nut trees. It is men like that who have made Canada what it is. It takes more than mere weather to stop them. The never-say-die spirit of pioneers speaks throughout his report:

"Black walnuts, butternuts, some oaks, hazels and American chestnuts (Ohio buckeyes) all came through last winter well. However, late frosts reduced the nut crop. Of these species, filberts are not getting anywhere. Winkler, I believe, will eventually make a go of it. Heartnuts got a rough deal last winter, and European buckeye chestnuts were hurt a little by late spring frosts. Some Manchurian walnuts also got a setback with spring frosts, and some did not. Carpathian walnuts killed back quite a lot, so did most of my hybrid walnuts. Hybrid hazels seem perfectly hardy. Pecans, beechnuts and sweet chestnuts almost passed out of the picture last winter. Giant hickory from Ontario seems hardy but particular about the kind of soil and conditions. When irrigated, too much water will kill them. And this is true also of walnut and butternut seedlings. I have no acreage of nut trees. I grow seedlings and plant them wherever I find a place protected from the stock and within reach of moisture from the irrigation ditch, as this is a desert, cactus country.

"I always have a stock of seedling trees on hand, and whenever visitors show any interest, I give or send them fruit or nut trees and a few perennial flowers. So there are sure to be a few nut trees, some day, growing successfully throughout Alberta.

"There is more benefit from this northern seed, especially as I am using a commercial pollen with the hope of getting a hardy white walnut with possibly a coarse bark like the black to ward off sun-scald in this climate. They are on their way. I don't know when we'll be eating these imaginary nuts. However, it is not so long ago that fruit growing on the cattle range was a dream. I grew the first pears in Alberta, so far as we know. Now we are insulted if there is not a crop of fruit every year. I have many seedlings of standard apples, unnamed, that are really choice fruit, and, of course, a few named varieties that are doing fairly well. Minnesota has done great work in apple and plum breeding for the north. We are enjoying some of them right here.

"I am sorry that I have no data on husking, cracking, etc. Really even the hardiest, best trees bear nuts that, while of fair size, do not have fleshy kernels, and some have three sections instead of two. Butternuts are very sweet with fair size kernels. I was surprised, after a long hard winter, to find the Ginkgo trees still alive and gaining growth. Credit some or all this result to J. U. Gellatly and Paul Crath for supplying me with seed, seedlings, and pollen to carry on with. I am greatly obliged to them and also to George Corsan of Echo Valley, Islington, who has a wealth of nut interest.

"We have had a mighty dry year here, so, between irrigating and tending the largest herd of Ayrshire cattle in the prairie provinces, I have been busy. The town of Brooks is probably the only town in Canada on straight Ayrshire milk; and the change in Brooks from a box-car on a siding years ago to the Brooks of today, with its hundreds of healthy children now on the streets, is the marvel of a man's lifetime."

George H. Corsan, Echo Valley, Islington, Ont.: "Last winter, 1942-43, was by far the coldest ever recorded. No damage to filberts. A few inches of twigs were hurt on certain English walnuts. The Stranger heartnut, a tender variety, passed through unscathed. Persimmons and pawpaws passed without a bud killed. These are perfectly hardy varieties. Jujubes passed O. K., but that may be due to the very deep snows."

Dr. Oliver D. Diller, Associate Forester, Ohio Experiment Sta., Wooster, Ohio: "You will be glad to know that the experiment station has set aside some land for improved varieties of nut trees. If you find some promising walnuts which might be tested in this part of the state, we should be glad to have you keep us in mind." This is indeed welcome news and will be appreciated by all growers in this area.

J. G. Duis, Shattuc, Ill.: "A chicken yard is one of the best places to grow nut trees."

J. U. Gellatly: "I do not believe in selling nuts for seed purposes except on a very large scale."

J. C. McDaniel: "A neighbor lost some 5 year old Chinese chestnut trees following a summer drouth on silty loam soil, rather shallow to hard-pan. It is my observation that deeper, sandier soils (not too extremely sandy) are best for chestnuts in the coastal plain and other regions subject to summer drouths. In the mountains where summer rainfall is more uniform, they thrive also in clay soils."

G. H. Corsan: "Best success in grafting (hickories) has been in juicy, wet springs. Heartnuts must not be budded until late August (in Islington, Ontario). Heartnuts must not be pruned."

A. L. Young, Alberta: "There is a demand for young walnuts for pickling." (Does anyone know the details—when to pick, how to pickle?) (Note by Ed. Several recipes and methods in Am. Nut Journal now out of print but indexed by Ed. Copies of this index in his hands and those of Mr. C. A. Reed at Washington. Also recipes in 33rd Ann. Report p. 95).

Sterling A. Smith, Vermillon, O.: "With me, summer budding is the most successful means of propagating black walnuts."

J. Russell Smith: "Chinese chestnuts will blight some if under-nourished." Which includes the wrong kinds of soil, if uncorrected.

"Does anyone know for sure how to get pawpaw seed to germinate?" Several have asked this question. The chairman has had the same trouble, so can not answer. (Note by Ed. See "Nut Puttering in an Offyear" in this report.)

So far as the correspondence shows, no state or federal department buys seed on a large scale (with the exception, now, of chestnut seed) from trees of the better named varieties with which to grow seedlings for distribution by state nurseries for forest planting. All nut seed seems to be gathered haphazardly.

W. G. Tatum, Lebanon, Ky.: "A nut tree with plenty of root, top cut back one third, promptly set, roots protected, stem wrapped, 4 inches, mulch applied, set either spring or fall, grows for me 99% of the time. Failures are not worth mentioning if the above conditions are met."

Carl Weschcke, St. Paul, has a dozen or so extra hardy Persian walnuts by selection from some 12,000 seedlings. Also is introducing the hardy "Hazelbert," result of crosses between wild varieties and filberts.

"Dip wire screen guards in red lead and they will be good for twenty years."

Thomas and Stambaugh, among the black walnuts, are, with justice, entrenched leaders, but it will be well to watch Patterson, Mintle, Elmer Myers, Eureka, Creitz, Todd, and other promising new ones less well known. Thomas is more prolific in the south (generally) than in the north, which indicates that its bloom may possibly be out nearly enough to suffer in the north from late frosts.

Among chestnuts, the weight of evidence favors Hobson, Carr and Reliable, though J. Russell Smith says he has something he likes better than the first two.

Among pecans, Major, Greenriver, Pleas; among filberts and hazels, Winkler, Jones hybrid, Cosford, Gellatly, Brixnut; among Persian walnuts, Broadview, one or two Crath varieties, Payne, Breslau; among hickories, Stratford, Fairbanks, Barnes, Glover, Weschcke. These seem, so far as the returns show, to have outstanding points of superiority. In any such survey, injustice is bound to be done to some not fully reported.

Outside of filberts in the northwest, no northern grown nut can yet be said to have reached the status of a profitable commercial crop. (Exception: The narrow pecan belt along the southern terminus of the Ohio river valley; mostly wild trees.) Dr. A. S. Colby, University of Illinois says, "The report from the State Statistician at Springfield indicated a crop of 575,000 pounds of pecans for Illinois in 1943. I don't know just where they came from." Short crops were reported in Calhoun and Gallatin, leading nut producing counties. No reports have been received as to the size of pecan crops in the Kentucky and southern Indiana portions of the same belt.

The search for better varieties must continue, but it is also altogether likely that with an orchardist's attention, with cultivation, mulching, fertilizing, spraying one to three times yearly with Bordeaux and lead sprays, we might approach the commercial goal more closely with what we have today. Is anyone treating a bearing nut orchard as well as he would treat an apple orchard? That's the test.

S. H. Graham of Ithaca, N. Y. says: "The Ohio is commonly regarded as hard to hull. With a chained tire husker it hulls as well as any." He rates it for hardiness and a percentage of 90 to 100 for filled nuts, while Thomas yields only 0 to 90%.

Seasonal Zones Compiled from the U.S. Department of Agriculture Records, Based on the Average Date of the Last Killing Frost in Spring

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Juglone—The Active Agent in Walnut Toxicity

By George A. Gries, Connecticut Agricultural Experiment Station

The problem of walnut toxicity dates back at least to the writings of Pliny. In his "Natural History," this Roman philosopher stated that "the shadow of walnut trees is poison to all plants within its compass" and that it kills whatever it touches.

The first rebuttal to the existence of such a toxicity was forwarded by Evelyn in the 17th century. This author discussed the high regard in which walnuts were held in Burgundy as field trees. The roots of these trees were below the plow sole and thus did not affect either cultivation nor the growth, of grasses and cereals beneath them.

The pros and cons of the problem have been reviewed several times in the recent proceedings of the Northern Nut Growers Association. (Greene, 1930; MacDaniels and Muenscher, 1942; Brown, 1943.) That the roots of walnut trees are toxic to the roots of certain crop plants in direct contact with them is widely accepted. In nature this toxicity seems to be limited to plants with tap root systems such as tomato and alfalfa (Davis, 1923) and those with other types of deep root systems such as apple trees (Schneiderhan, 1927), rhododendrons (Pirone, 1938), and privet. This toxicity is exhibited only when there is a direct contact between the roots of the two plants involved. (Jones, 1903; Massey, 1925). That the wilting observed under walnuts is due to a toxic product from the bark of the walnut, and does not result from a lack of water, is substantiated by the fact that the vascular or water conducting system is discolored for several inches above the point of contact with the walnut root. This symptom is very similar to that produced by vascular disease fungi. No such discoloration results from wilting due to competition for water. This symptom of toxicity has been overlooked by many workers in the field.

Massey (1925) suggested that the toxic component of walnuts might be juglone. This idea was further supported by Davis (1928). Today this concept is widely held. Chemically this substance is known as 5, hydroxy-1, 4, naphtho-quinone and belongs to a group of strong oxidizing agents with commercial uses, including tanning agents, medicinals, poisons, etc.

A knowledge of the physiology of juglone in the walnut is essential to an understanding of the divergent results obtained by various experimenters. Juglone, as such, occurs probably only in minute quantities in the inner root bark, and in the green husks of the nuts. These regions are, however, rich in a substance known as hydrojuglone. This compound, the colorless, non-toxic, reduced form of juglone is immediately oxidized to its toxic form upon exposure to the air or some oxidizing substance from the roots of other plants. Upon standing in the air juglone again disappears, being either changed back to hydrojuglone or broken down into other non-toxic substances.

This sequence of events may be noted in a fresh green husk of a black walnut. When the fresh husk is cut, the interior is white but immediately turns yellow as the colorless hydrojuglone is transformed into the yellow juglone. Upon standing or drying the husk becomes black as further chemical changes occur. It is impossible to extract juglone from these dried husks without first reoxidizing them.

It now becomes possible for us to understand some of the discrepancies in the studies on walnut toxicity. If walnut bark or other plant parts are allowed to become desiccated, no toxicity may be found. If the roots of plants do not contact plant parts containing juglone or hydrojuglone, their oxidizing ability can not produce the toxin. Further the relative amounts of juglone in various species of Juglans has not been completely investigated. It does occur definitely in J. nigra and J. cinerea and has been reported as being in J. regia. Other species need investigation before being included as sources of juglone.

It is known that many plants are not adversely affected when grown under or near walnut trees. Some of these have root systems too shallow to contact the roots of the walnuts, especially in plowed ground. Some plants may send out sufficient surface roots to keep the plant alive in spite of injury to the deeper roots. The possibility that the roots of some plants are capable of withstanding the oxidizing power of the juglone is currently under study.

In early American folklore, the inner bark and the husks of the nuts were used as a source of a yellow dye for cloth. This yellow dye is juglone. The ancients also used this method of dying both cloth and hair.

Another property of juglone is its toxicity to fish. A few years ago it was a common practice in the South to cut the husks from young nuts and throw them immediately into a still pond of water. The fish, stunned by the juglone, would rise to the surface and were collected and eaten. No one seemed to worry about the effects of such poisoned food on the consumers.

Juglone is toxic to fungi and bacteria. Of all the medicinal powers attributed to walnuts by the Greeks and Romans, its use in curing certain skin diseases including ringworm has held up through the ages until many today can recall the use of the green husks for control of ringworms. Brissemoret and Michaud (1917) reported the use of juglone in clinical cases for the cure of eczema, psoriasis, impetigo and other skin diseases and concluded that juglone deserves extensive use in dermatology. To our knowledge the medical profession has not followed up the possibilities which this substance offers. The author is familiar with one case in which pure juglone was applied to a persistent ringworm infection. The infection disappeared within a month after treatment was begun. Though conclusions can not be drawn on a single case, certainly this observation lends credence to the medicinal lore of the ancients and the American pioneers.

During the fall and winter of 1942-43, investigations on juglone were started at the Connecticut Agricultural Experiment Station in conjunction with studies of the effect of other plant toxins on the roots of higher plants. When the toxicity of this oxidizing compound was established, it was produced in some quantity both by extraction from walnuts after the method of Combes (1907) and by synthesis after the method of Bernthsen and Semper (1887). Working on the assumption that the killing of germinating fungus spores and root hairs are similar phenomena, juglone was subjected to standardized laboratory tests for fungicidal value. In a series of experiments, this compound proved to be equally toxic with the copper in Bordeaux mixture. Such a high degree of toxicity was deemed worth further investigation, so juglone was tested as a seed protectant and as a spray in field trials for the control of black spot of roses.

As a seed protectant, juglone failed miserably. It's toxicity to the noncutinized surfaces of root tissues was so great that germination was abnormal and greatly impaired. The injury noted here was apparently the same as that discussed by Brown (1943) and that which occurs normally in the field.

In field tests on the control of black spot of roses juglone stood up well. No phytotoxic activity could be noted on the cutinized stem and leaf surfaces. On the variety George Ahrens, juglone gave equal control with 2½ times as much 325 mesh sulfur, the standard control for this disease.