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Nut trees are subject to the same types of parasites as cherries and plums and should be similarly sprayed. (See table, p. 114.) Chewing insects do not attack the nuts proper, but by defoliating the trees they rob the nuts of nourishment and stunt the meats. Walnuts are susceptible to several leaf spots but to none that cannot be controlled easily with fungicides. The pruning of nut trees is about the same as for cherries and, similarly, you need not thin off their crops. Dependable texts on fruit and nut culture include: Fruits for the Home Garden, U. P. Hedrick (Oxford University Press); Modern Fruit Science, Norman Franklin Childers (J. B. Lippincott Co.); Dwarf Fruit Trees, Lawrence Southwick (The Macmillan Co.); Cultivation of Citrus Fruits, H. Harold Hume (The Macmillan Co.); Evergreen Orchards, William Henry Chandler (Lea & Febiger); Nut Grower's Handbook, Carroll D. Bush (Orange Judd Publishing Co.); Subtropical Fruit Pests, Walter Ebeling (University of California Press). |
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