棉铃虫是我省棉花蕾铃期主要害虫。由于长期单一施用化学农药防治,害虫抗药性越来越强,滴滴涕等常用农药防效显著下降,农药用量不断增多,不仅使治虫成本提高,防治效果差,而且污染环境,破坏了棉田生态平衡,引起公害。利用棉铃虫核多角体病毒防治棉铃虫有许多优点。目前已有20多个国家利用棉铃虫病毒在棉花、玉米、高 Cotton bollworm is our province cotton boll date main pests. Due to the long-term single application of chemical pesticides, pest insecticide is more and more strong, DDT and other commonly used pesticide control effect decreased significantly, the increasing use of pesticides, not only increased pest costs, control effect is poor, and pollute the environment, undermining the ecological balance of cotton fields, Cause pollution. There are many advantages to using bollworm nuclear polyhedrosis virus to control cotton bollworm. There are currently more than 20 countries that use the cotton bollworm virus in cotton, corn and high