1.整枝灭虫:在棉花蕾铃期,将田间管理时摘除的顶心、群尖以及打掉的无效花、蕾等带出田外,可以明显减少田间卵和初孵幼虫的存量。据调查,在二代棉铃虫发生期适时整枝一次,可使百株卵量下降40％—60％; 1. Pruning pest control: cotton boll period, the field management removed when the top heart, group of sharp and destroyed the invalid flowers, buds out of the field, you can significantly reduce the stock of eggs and newly hatched larvae. According to the survey, in the second generation of cotton bollworm timely occurrence of pruning once, can reduce the number of 100 ova 40% -60%;