自九十年代初北方棉区棉铃虫大爆发以来,南方棉区棉铃虫的危害亦逐年加重。由于目前使用于防治棉铃虫的药剂具有胃毒和触杀作用、残效期较短,药效高峰期在施药后3天,而第3、4代棉铃虫的卵历期约为2.5天,产卵后第4天才开始转移至生长点或花蕾作 Since the outbreak of the cotton bollworm in the northern cotton area in the early nineties, the harm of bollworm in the southern cotton area has also been increasing year by year. As currently used in the prevention and treatment of the bollworm's agents have stomach poisoning and contact effects, short residual period, peak efficacy in the application of 3 days after the 3rd and 4th generations of cotton bollworm's egg period of about 2.5 days, 4 days after the eggs began to transfer to the growth point or flower buds