随着我县农作物种植结构的调整等原因,豆天蛾的发生日渐加重。以幼虫食害大豆叶片,轻则吃成网孔,重则将植株吃成光杆。据观察,我县大豆田1987年平均百株有虫27头,严重地块高达150头,平均被害株率68%,已成为我县大豆生产中的主要障碍。发生规律豆天蛾在我县一年发生一代,以老熟幼虫在土中 With the adjustment of planting structure of crops in our county and other reasons, the occurrence of bean moth is getting worse. To larvae eat soybean leaves, ranging from light to eat into the mesh, while the plant will eat into polished rod. It is observed that in 1987, an average of 100 soybean plants in our county had 27 pests, with a total area of ​​150 serious blocks and an average victimization rate of 68%. This has become a major obstacle in soybean production in our county. Occurred Law bean moth occurs in my county a year to mature larvae in the soil