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杨干象虫(Cryptorhychus lapathi L.)是杨树幼树的一种主要钻蛀性害虫。在我省发生普遍,危害严重。由于其在于、枝内隐蔽为害,防治比较困难,现在生产上主要靠人工和化学药剂防治。为探讨利用天敌昆虫防治杨干象虫的途径,我们今年从外地引进天牛肿腿蜂(Scleroderma SP.),进行了较大批量的繁殖。对杨干象虫的幼虫和蛹做了室内致死和寄生率测定及模拟林间防治试验,并进行了多次林间防治试验。已初步看出应用天牛肿腿蜂防治杨干象虫有一定的效果。现将试验情况整理如后。
Cryptorhychus lapathi L. is a major borer pest of young poplar trees. Common in our province, endangering serious. Because of its lies, hidden in the branches of harm, prevention and control more difficult, and now mainly rely on artificial and chemical control of production. In order to explore the ways of using natural enemy insects to prevent dry elephant asphodeloides, we introduced Scleroderma sp. From other places for breeding in larger quantities. The larvae and pupae of Asparagus officinalis were tested for indoor lethality and parasitism and simulated forest intercropping and control experiments. It has been initially found that the application of bezoar beetle to prevent Yang dry elephants have a certain effect. Now test the situation after finishing.