In the matter of spraying materials: They were discovered through accident, in an effort to prevent thieving in the vineyards of Bordeaux, France. It seems that workmen on the way to their places of employment were in the habit of foraging on the vineyards of the farmers along the way. To prevent that some of the fruit growers conceived the idea it would be a good thing in order to scare them to get blue vitriol and mix it with water and spray it on the fruit along the roadside. Later in the season, very much to their surprise, they found that the grapes that were treated in that way were not affected with the brown rot. So they tried it again to see whether they were right about that being the cause, and it wasn't long before they used it for that purpose. They stopped the thieving, but they also discovered a scientific truth, that the Bordeaux mixture was a fungicide and that fact has been of immense value to the world since then.
When the San Jose scale came into this country from the west, some man who had used sheep dip for sheep ticks, said: "If it is a good thing against sheep ticks, why isn't it good against this little vermin they call the San Jose scale?" He tried it on the trees, and he found that it was an effective remedy for the San Jose scale. So we have lime-sulphur today as one of the spray materials in very common use.
Among other things the scientists told us we couldn't use lime-sulphur and arsenate of lead together, that they would have to be sprayed over the orchard in separate sprays, that is, we would have to go over the orchard with lime-sulphur and then again with arsenate of lead, that when you combined the two the chemical combination was such that it deteriorated the lime-sulphur. Some farmer who didn't know about that scientific proposition determined to put them both on together, and he found that it not only worked all right but that the two were really more effective when combined than if put on separately. So you see it was thieves, sheep ticks and ignorance that are responsible for three of our most successful ways of spraying at the present time.
Now, scientific men have come in and given us a great deal of information along various lines in regard to spraying, and I don't decry science in any sense at all. These men, while they were not scientifically educated, discovered scientific truths, and it is truths we want after all.
Just what your position on this spraying proposition is here in Minnesota, whether you have commercial orchards up here or not, I have not been able to discover. I presume that your plantings here are very largely that of the farmer and amateur rather than the commercial orchardist. In Illinois we have our large commercial orchards, and we have gotten beyond the question of whether it pays us to spray or not. For a man to be in the commercial apple business in Illinois and not spray means that he doesn't accomplish very much and his product doesn't bring him any profit.
Now, whether you spray commercially or whether you spray for your family orchard in an amateur way, it doesn't matter so far as the spraying is concerned—you should spray in either case. If you have a community where you have few orchards and they are small, it behooves you to get together and buy a spraying outfit, combine with your neighbors and buy a good spraying outfit, and then have some man take that matter up who will do it thoroughly in that neighborhood and pay him for doing it. In that way, if you hire it done, it doesn't interfere with your farming operations and gets your spraying done on time. I have noticed this with stockmen and with grain farmers, men who are not directly interested in fruit but combine it with their regular business, that they consider fruit growing a side line and such a small part of their business that they usually neglect it altogether. In the matter of the spraying they keep putting it off until tomorrow. When the time arrives for spraying you must do it today and not put it off until tomorrow.
Time is a very essential element in spraying. To give you an illustration: A few years ago, in spraying a Willow Twig orchard, consisting of eighteen rows of trees, I sprayed nine rows of those trees, or about half of the orchard, we will say, the first part of the week, the first two days. And then there came on a two or three days' rain, and the balance of those eighteen rows was sprayed the very last of the week or the first of the following week. The two following sprayings went on just at the right time for them, but when it came to the harvesting of that crop the trees that were sprayed first, that were sprayed immediately after the bloom fell, produced 175 bushels of very fine No. 1 fruit, free from scab, while the other nine rows, equal in every respect so far as the trees are concerned and the amount of bloom there was, produced seventeen bushels of No. 2 fruit, no No. 1 fruit at all.
The Willow Twig is one of those varieties that is very susceptible to scab, and of course this is a marked illustration of what happens if you don't spray at the right time. Notwithstanding the fact that the nine rows, the last ones, I speak of, were sprayed with the two following sprays at the same time that the other part of the orchard was sprayed, the results were entirely different because the first spraying, which was really the important one so far as the scab is concerned, was not put upon the tree at the right time.
The scab fungus, which seems to appear on your apples out here, is one of the most insidious diseases we have in the whole fruit industry. I think that scab fungous disease is probably the one that affects you the most. Now, scab fungus will not be noticed particularly in the spring of the year. The time that those spores are most prevalent, the period of their movement as spores in the atmosphere and the lodging upon the fruit, is right at the beginning, right about the time of the blossoming or immediately following. For a period of about two weeks at blooming time and after is the time that you have that condition.
And the trouble is—it is just like typhoid fever. You let typhoid fever get into a family, and they do not think anything of it except to take care of the patient properly if he has it, but it doesn't scare the neighbors, it does not interest them. But let the smallpox break out in a community, and everybody is interested and scared to death for fear they are going to get the smallpox.