棉铃虫在本省常年发生四代 ,近年发生了不完整的第五代。摸清棉铃虫越冬蛹在不同作物田的分布数量以及在年生活史中最薄弱的阶段 ,结合农事操作 ,消灭大量越冬蛹 ,减少发生基数 ,降低发生程度上棉铃虫综合防治的措施之一。为此 ,从 1 994年开始这方面的调查研究 ,表明春季耕翻 Cotton bollworm occurs in the province perennial four generations, in recent years, an incomplete fifth generation occurred. To find out the distribution of overwintering pupae of cotton bollworm in different crop fields and the weakest phase in the annual life history, combined with agricultural operations, eliminate a large number of overwintering pupae, reduce the occurrence of base, and reduce the degree of occurrence of the integrated control of cotton bollworm measures. To this end, from 1994 onwards, investigations and studies in this area show that the spring tillage