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Coconuts are a unique species and hence, necessarily, entirely self-fruitful. No other nut is dependably so, and two or more varieties of each should be planted together to ensure pollination. 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. |
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