Abstract
Results of summer oil spraying during the last three years on large blocks of apple. trees have shown that continuous application of oil emulsions during the growing season may bring about physiological changes in growth processes and fruit production. More injury to foliage resulted from early sprays, applied during May and June, than from late sprays, applied during July and August. Of the various vegetable and animal oils tested, Sperm Oil proved to be the least injurious to apple and peach foliage.
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