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近年来,杨尺蠖(Apochernia cinerarius Erscheff)在豫东防护林区危害成灾。为了寻求一种有效而能保护天敌的防治方法,我们于1983年4月在国营宁陵林场进行了核多角体病毒(NPV)防治杨尺蠖幼虫的试验,效果较好,杀虫率达95％以
In recent years, Apochernia cinerarius Erscheff has been harmed by disasters in the shelter-forest areas in eastern Henan. In order to seek an effective control method to protect natural enemies, we conducted NPV test on Larvae Larvae in Ningling Forest Farm in April 1983. The results showed that the insecticidal rate was 95% To