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t Growers' Association. We have had, however, one man, and will have two men, on the southern pecan diseases in Georgia, on pecan scab and pecan leaf diseases, who are winning out beautifully, and have nearly solved many of the problems, including the pecan scab. One of the difficulties is the occasional late summer rainy spell, bringing diseases and bad conditions. But in general we have solved the problem pretty well. Then we have the more permanently dangerous disease, pecan rosette, which has taken about half of the pecans in some sections of the South, especially in south Georgia and in Florida. That disease is being experimented upon in the most extensive way of any of our projects. There is only one word to say about pecan rosette, and that is--humus--the disease is cured by the application of humus. MR. REED: How far north is the walnut rosette disease? DR. WAITE: As far as Falls Church, Va., but not much in the North. MR. REED: The question was asked yesterday as to whether it could not be overcome in this latitude. DR. WAITE: That nobody knows. The soils east and south of Washington are all acid, and the conditions are wrong for rosette. The soils have no tendency to chlorosis. They are, in fact, antichlorotic. Theoretically you could get the rosette conditions in the Piedmont region, but you are almost certain not to find them over this way. Now in the organization of the Bureau of Plant Industry there are at least two main offices where nut problems would be studied; in the Division of Horticultural and Pomological Investigations and in my office, where the diseases are studied. Remember, also, that the insect pests are studied in the Bureau of Entomology; they have experimented quite extensively with pecan insect pests, and have the organization to handle such pests. Of course there is a Bureau of Markets and the Office of Soil Fertility in the Bureau of Plant Industry, which handle the pecan, incidental to the other studies. MR. BIXBY: I would like to ask Dr. Waite a question. The association has spent a good deal of time in developing exact methods of measuring quantitatively the various characteristics of nuts which are considered valuable, and that study has given us methods of comparing notes from year to year, comparing the same nut, and I have noticed that it is quite frequent that the kind of nut that is good one year, will not be so good the next year. To take an example, the Clark
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