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杨干象甲是我国森林植物病虫害检疫对象之一。近年来在东北各省严重为害杨树。据调查,仅嫩江地区的林甸、富裕、龙江、杜蒙自治县受该虫危害的杨树人工林面积即达六万余亩。过去主要采用0.6%六六六柴油涂干法防治杨干象甲幼虫,但因耗油量大、成本高,已不适应生产发展的需要。1978年后我所应用50%辛硫磷或50%杀螟硫磷100—200倍液涂干防治杨干象甲幼虫均获得良好防治效果。但对一些植株高大,被害部位较高的林分防治比较困难。为此我们在1979
Yang Qian meica is one of the forest quarantine object of plant diseases and insect pests. In recent years, serious damage to the poplars in northeastern provinces. According to the survey, only the area of poplar plantations endangered by the insects in Lindian, Fuyu, Longjiang and Dumont Autonomous County in Nenjiang reached an area of more than 60,000 mu. In the past, it mainly used 0.6% BHC coating and coating to dry and dry the larvae of A. elegans, but due to the large fuel consumption and high cost, it was not suitable for the development of production. After 1978, I applied 50% phoxim or 50% fenitrothion 100-200 times liquid to dry and cure Yang beetle larvae have good control effect. However, it is difficult for some tall plants to control the tall parts of the damaged area. For this we are in 1979