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二点委夜蛾(Athetis lepigone Moschler)是夏玉米产区一种新发生的害虫。调查发现,秸秆还田地块尤为严重。本试验对秸秆还田与药剂处理地块的二点委夜蛾的危害情况进行了调查。结果表明,秸秆还田未进行药剂处理的地块被害株率达到82%,百株虫量最大为88头,喷除草剂和杀虫剂后二点委夜蛾发生量及危害率与未喷的差异不显著,百株虫量略有降低,但无秸秆还田地块喷施除草剂与杀虫剂后,其危害率显著低于上述处理,被害株率为20%,百株虫量为6头。
Athetis lepigone Moschler is a newly emerged pest in the summer maize area. The survey found that straw returned to land is particularly serious. In this study, we investigated the damage of the two-stage insecticide on moths returning to straw and pesticides. The results showed that the rate of damaged plants in the plots without straw was 82% and the number of one hundred was up to 88. The occurrence and harm rate of the second instar larvae after herbicide and insecticide were not sprayed The difference was not significant, the number of insects decreased slightly. However, no herbicide and insecticide were sprayed on the plots with straw residue. The damage rate was significantly lower than that of the above treatments. The damage rate was 20% For six.