Spraying the Orchard.
HON. H. M. DUNLAP, SAVOY, ILLS.
(Continued from March No.)
Then just as soon as your bloom falls, just as soon as the blossom petals fall, then you want to spray again. You should use arsenate of lead along with your lime-sulphur in both sprayings, because your arsenate of lead will take care of a great many insects that injure the fruit. The first spraying, immediately before the bloom, with arsenate of lead is for the curculio, what is called the Palmer worm, for canker worm—if you have any of them—the tent caterpillar, the leaf roller and various other insects that injure the fruit and the foliage. The spray just immediately after the bloom in addition to fungous is a codling moth spray. To get rid of the codling moth worm you use the arsenate of lead. The codling moth egg hatches shortly after the bloom falls, and the little worm instinctively goes into the blossom end of the apple, because that is the only place it can enter the apple at that particular time. Just why it does not enter on the side of the apple I can not say, but there is a little fuzz on the outer side of the apple at that stage of growth that perhaps prevents their getting in, and that fuzz as the apple grows larger disappears, so a little later they can enter on the side or at any other part of the apple that they choose.
Hon. H. M. Dunlap, Savoy, Ills.
When the blossoms fall the apples stand upright on the tree, and the little pointed leaves that are on the blossom end of the apples, that we call the calyx, are all open, and at that time you can spray so as to get the arsenate of lead on the inside. Within a week or ten days after the bloom falls these sepals, or little leaf points, gradually close together until they are all closed up tight, and after that you can't get your spray in there. After the worm hatches he gets between the little leaves of the calyx and goes on the inside of the apple and into its center. You want to have your poison ready for Mr. Worm when he enters the blossom end of the apple, and the more thoroughly and more effectively you spray the better are the results.
It has been said that if you spray thoroughly at that time, that that is the only spray you really need for the codling moth worm. I don't agree with that, as there is always a second brood of worms. I use the arsenate of lead along with the lime-sulphur for all these sprays, before the bloom and after the bloom, and if you don't spray more than three times you will be doing yourself a good service, and it will well pay you. In some parts of the country they spray as high as seven or eight times in the commercial orchards, but I would say in a farmer's orchard three times would be enough, once before the bloom and twice later, and you will notice the good results.
There are other sprays besides these, but none perhaps of any importance to you up here except the winter spray for the San Jose scale, if you have that, and I noticed one or two specimens out there that seemed to have the scale upon them. That spray should be done either in the fall or early winter or late winter while the trees are dormant. That has to be put on of winter spray strength, using lime-sulphur or some of the other San Jose scale sprays without the arsenate of lead, as you don't need to use the lead with this spray.
Now, as I stated to start with, these remarks ought to be appropriate to your needs and to make them so it would be a good deal better for me to give you the opportunity of asking questions or of discussing this question of spraying yourselves rather than for me to go into this subject any further and not know just exactly what you would like to listen to. If you have any questions to ask I would be glad to answer them if I can.
Mr. Horton: What proportion of the lime-sulphur and arsenate of lead do you use?
Mr. Dunlap: If we get the commercial brand of lime-sulphur we use it in the proportion of three gallons of that commercial mixture to 100 gallons of water and for the arsenate of lead in the same spray tank at same time we use four pounds of arsenate of lead to the 100 gallons.
Mr. Horton: Have you ever carried over lime-sulphur from one year to another?
Mr. Dunlap: Yes, sir, we often do that, carry it over until the next year. It wants to be kept where it will not freeze.
Mr. Horton: Is there much danger of evaporation so it would be too strong to use next year?
Mr. Dunlap: Your barrel should be kept bunged tight.
Mr. Richardson: Mr. Dunlap fails to say anything about dormant sprays. Don't you use dormant sprays?
Mr. Dunlap: I was just speaking about the dormant or winter spray. When you spray in the winter time use lime-sulphur or scalicide.
Mr. Richardson: Another thing: I take a little exception to what Mr. Dunlap says in advocating buying a spraying machine collectively in the neighborhood, for the simple reason that it is necessary to spray at one particular time, at the vital time just before the blossoms fall and at the time they have fallen. We have found it almost impossible to do any spraying for anybody except ourselves at that time. We talked that matter over before we bought spraying machines.
You said you wondered whether there were any apples grown here commercially. Out of our town we shipped this year eight car-loads of apples. We have three power sprays in our orchard, and we talked that matter over before we bought them, about buying collectively, and we decided it was absolutely impossible to do it. I don't think it is feasible for a small grower to depend on that kind of thing because he may be disappointed. My theory is for each one to have his own sprayer, large or small. Another thing, we find a pressure of 200 pounds is better than spraying without that pressure; we get better results.
Mr. Dunlap: The gentleman misunderstood me. I said where you have just small orchards you could do it collectively. Of course, I do not advocate where a man has enough to have use for a spray machine for his own orchard that he get one collectively. That would be a great mistake, but where a man has only fifty trees in a neighborhood where there are no big orchards, it would be better for a dozen or more to combine. If you can get around with it in a week you will be all right but not longer than that.
Mr. Richardson: I beg to differ with you just the same. I think if you want to spray you must spray at the time; it might rain the next day, and you might miss the whole season.
Mr. Dunlap: There are a good many people who don't like to go to the expense of a spray machine just for fifty trees or 100 trees. If they would combine with a few neighbors they would do some spraying work, otherwise they wouldn't do any at all. If a man will buy a machine and do his own spraying, why, that is certainly the best thing to do, but if he won't do that it is better to combine with his neighbors and do it than for none of them to do it. Community spraying is the best thing to do if you have only small orchards.
Mr. Dyer: What pressure would you recommend in spraying for codling moth where arsenate of lead is used?
Mr. Dunlap: You can do effective spraying all the way from sixty pounds to 200 pressure. My preference is about 150 pounds. I have known instances where considerable injury was done by using too high pressure. We have sprayed at 225 pounds, but we have given that up. It is not as good as from 150 to 175 pounds.
Mr. Dyer: I would like to know about what quantity of arsenate of lead and lime-sulphur combined would you recommend? How much of each?
Mr. Dunlap: In 100 gallons of water we put three gallons of the concentrated solution of lime-sulphur, as we buy it commercially, three gallons to 100 gallons of water, that is, for the summer spray, and for the arsenate of lead we use four pounds of arsenate of lead to the 100 gallons.
Mr. Dyer: In connection with that I would like to ask if you have used or would recommend pulverized lime-sulphur?
Mr. Dunlap: I haven't used any.
Mr. Dyer: Do you know anything about it?
Mr. Dunlap: I think it is a more expensive proposition.
Mr. Dyer: I never used any myself. I thought perhaps that might work better in connection with the arsenate of lead than the liquid.
Mr. Dunlap: I couldn't say, I have always followed the policy of never departing from well-established lines of work until I am satisfied that the new one is absolutely all right. I have seen in our state men destroy the fruit from a forty or eighty acre orchard by taking up some new thing that was highly advertised and looked very attractive. It is not the same proposition, of course, but they tell us the devil comes in very attractive form. He comes with a swallow-tail coat and a red necktie and a buttonhole bouquet, and he looks very attractive. So it is with a lot of these things advertised; they look attractive but for our own good we ought to stick to the things we know and let the state experiment station try them and report upon them.
Mr. Huestis: Does Mr. Dunlap attribute the general dropping of apples to the scab fungus?
Mr. Dunlap: Not entirely.
Mr. Huestis: Do you think that it weakens the stem of the apples?
Mr. Dunlap: Yes, sir, the droppings of the apple is largely due to the scab fungus. Of course, some of the dropping occurs as the result of too much rain or too much dry weather, something of that kind, that is not attributable to scab fungus.
Mr. Kellogg: Does spraying injure the bees?
Mr. Dunlap: I have never had anybody prove to me that the bees were especially injured by spraying in the bloom. We do not practise spraying in the bloom, that is, we spray when we have about one-third of the bloom left on the trees. I have never had any injury, and we have orchardists who have bees in their orchards, and they go on spraying the same way. I do not believe bees are poisoned by the spray. Maybe I am mistaken about it, but I have never seen any conclusive proof of the bees being poisoned by the spray. It is possible they might collect it and carry it into the hives and might poison the brood in the hive. I don't know. I thank you. (Applause.)