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随着林业生产的发展,我县农田林网、速生丰产林面积不断扩大,近年来为害杨、柳、榆等多种林木的蛀干类害虫日趋严重,影响了林业生产的发展。目前虽然采用了针管注射、药泥堵塞虫孔等办法防治,但工效低,效果差。为提高防治效果和便于在生产中推广,我们于1983年将陕西省咸阳市植保机械厂生产的3WS-7型压缩喷雾器的雾化片换上一个自制喷注筒,改制成压缩喷注器。通过对桑天牛幼虫
With the development of forestry production, the area of farmland forest net and fast-growing high yield forest in our county has been expanding continuously. In recent years, the damage of stem borers such as poplar, willow, elm and other trees is becoming more and more serious, affecting the development of forestry production. Although the current use of needle injection, mud blocking wormhole and other methods of prevention and treatment, but low efficiency, poor results. In order to improve the control effect and facilitate the popularization in production, we changed the atomizer sheet of 3WS-7 compression sprayer produced by Plant Protection Machinery Factory in Xianyang City, Shaanxi Province into a self-made injection tube in 1983 and converted it into a compression injector. Pass larva on Morus alba