当田间棉铃虫发生数量较大时，及时采取喷施化学农药的应急措施，是非常必要的和有效的。但是，如果治虫心切，用药不当，方法不妥，甚至滥用农药、乱用农药，或者大面积盲目喷洒化学农药，不仅达不到预期的防治效果，反而杀伤了大量天敌，破坏了农田生态平衡，导致棉铃虫或其 When there is a large number of cotton bollworm in the field, it is very necessary and effective to take prompt measures to spray chemical pesticides. However, if the pest control is overwhelming, improper medication, improper methods, or even abuse of pesticides, indiscriminate use of pesticides, or large-scale blind spraying of chemical pesticides will not only fail to achieve the expected control effect, but will kill a large number of natural enemies and destroy the ecological balance of farmland, resulting in Cotton bollworm or its