棉铃虫是我省棉花蕾铃期的主要害虫,在关中地区每年发生四代,其中以二、三代为害最严重,特别第二代造成棉花损失最大。1974年鱼化地区棉铃虫大发生,加上后期阴雨,造成棉花减产。因此,棉铃虫的为害引起了广大贫下中农的重视,成为棉花增产迫切需要解决的问题,为了解决棉铃虫的防治问题,西安市鱼化公社的鱼化大队第五生产队、朝阳大队第四生产队、双旗寨大队第二生产队、老烟庄大队第二生产队与陕西师大生物系七三 Cotton bollworm is the main pest in cotton bud bolling period in our province. Four generations occur each year in the Guanzhong area, of which the second and third generations have the most serious damage, especially the second generation, causing the largest loss of cotton. The occurrence of bollworm in the fish-breeding area in 1974 occurred, with the overcast in the later period, which resulted in the decrease of cotton production. Therefore, the damage caused by the bollworm has aroused the attention of the vast majority of poor and middle peasants, becoming an urgent need to solve the problem of increasing cotton yield. In order to solve the problem of prevention and control of cotton bollworm, the fifth production team of the yinghua Brigade and the fourth production of the Chaoyang Brigade Team, Shuangqi Walled Battalion second team, the second team of the old smoke Zhuang Battalion and Shaanxi Normal University Department of Biology, Seventy-three