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棉铃虫是一种世界性的重大害虫。20世纪9年代,由于耕作栽培制度的变化和农业生态条件的改变,加上适宜的气候条件的影响,棉铃虫在我市棉田成为常发性害虫,且大发生频率较高。据荆州市植保站历年调查资料分析,1991～2000年10年中,棉田棉铃虫年平均大发生0.70代次。然而,从2001年
Cotton bollworm is a worldwide pest. In the nineteen ninties, due to the change of tillage and cultivation system and the change of agro-ecological conditions, coupled with the influence of suitable climatic conditions, cotton bollworm became a frequent pest in the cotton fields of our city, with a high occurrence frequency. According to Jingzhou City Plant Protection Station survey data over the years, from 1991 to 2000 in 10 years, cotton bollworm 0.70 generations occurred on average. However, from 2001