红铃虫是棉花生产的大敌,幼虫食害蕾、花、铃,造成落蕾、落铃和早期烂铃。因此.消灭红铃虫,是减少蕾铃脱落,防止烂铃的重要措施。在上海郊区,一年发生三代,属二代多发型。第一代红铃虫的为害程度、年史轻重决定于食料和气候,而小区域之间为害的轻重,主要决定于越冬基数。根据我们观察,每年六月下旬、七月上旬的蕾、花、幼铃脱落,百分之七十以上是虫害造成的,其中主要是由于红铃虫为害所致。越冬期间,防治红铃虫较好的生产队,不仅这一时期的 Red bollworm is the enemy of cotton production, larvae eat buds, flowers, bell, resulting in falling buds, falling bell and early bad bell. Therefore, the elimination of pink bollworm is to reduce the fall off the bell, an important measure to prevent the bad bell. In the suburbs of Shanghai, three generations a year, is a second-generation multi-hairstyle. The first generation of pink bollworm damage, the age-old severity depends on the food and climate, and the severity of harm between small areas, mainly determined by the winter base. According to our observations, buds, flowers and young bellows fall off in late June and early July each year, and more than 70% are caused by pests, mainly due to the damage caused by the red bollworm. During the winter, prevention and control of pink bollworm better production team, not only during this period