棉铃虫是重要的棉花蕾铃期害虫之一,且为害日趋严重,对丰产棉田的威胁更大。因而在治蚜保苗的基础上,于棉铃虫严重发生为害的棉田,进行有效的局部保护,成为减少雨季前蕾铃脱落,保证丰产的重要措施。一发生概况与为害习性华北棉区常年在棉田发生三代,以蛹期在土内越 Cotton bollworm is one of the important cotton boll stage pests, and the damage is more serious, the threat to the cotton yield is greater. Therefore, on the basis of treating aphids and seedlings, effective local protection is given to cotton fields severely damaged by bollworm, which becomes an important measure to reduce the fall-off of the pre-rainbows and ensure the high yield. An overview of occurrence and pest habits North China cotton perennial occurred three generations in the cotton field to the pupal period in the soil