File:Control of the Japanese beetle on fruit and shade trees (1938) (20665887796).jpg

Title: Control of the Japanese beetle on fruit and shade trees
Identifier: controlofjapane237flem (find matches)
Year: 1938 (1930s)
Authors: Fleming, Walter E. (Walter Ernest), 1899-; Metzger, F. W. (Frederick William), 1901-
Subjects: Japanese beetle Control; Fruit Diseases and pests; Trees Diseases and pests
Publisher: Washington, D. C. : U. S. Dept. of Agriculture
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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CONTROL OF THE JAPANESE BEETLE ON FRUIT AND SHADE TREES 6 such large numbers as to cover the fruit completely and ruin it (figs. 6 and 7). The riper fruit is attacked first by the beetles, and when the infestation is relatively light the damage may be confined to such fruits. HOW TO PROTECT THE TREES FROM INJURY It is possible to protect the foliage and the fruit of many of these trees by maintaining a deposit of spray residue on all portions subject to attack, during the period when the beetles are flying. The spray residue largely repels the beetle and prevents excessive feeding, the protection being obtained primarily by making the tree nonattrac- tive rather than by poisoning the beetle. Diseased and poorly nourished trees are more susceptible to attack than those in a healthy condition. It is practically impossible to
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Figure 3.—Injury by the Japanese beetle to the foliage of Norway maple. prevent the beetles from becoming established in orchards where brown rot and similar diseases are present. Orchards should be protected from plant diseases and insect pests other than the Japa- nese beetle by the regular spraying recommended for the various localities. Timeliness and thoroughness in the application of the repellent sprays are very important. As a general rule, and especially in locali- ties where the beetles are very numerous, the first sprays should be applied when the beetles begin to appear in the vicinity, before they become established on the plants. In localities where the infestation is not so dense, the first application may be delayed until the beetles begin to appear on the plants to be protected. In the heavily infested

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