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毒力测定结果表明 ,与 1994年相比 ,1998年棉红铃虫对溴氰菊酯、氰戊菊酯的抗性分别上升 72 .6倍和6 8.4倍 ,而对甲基对硫磷的敏感性则增加了近 10 0倍。由于防治棉铃虫、棉红铃虫过量使用菊酯类农药 ,溴氰菊酯等菊酯类杀虫剂防治红铃虫的田间效果近年呈迅速下降的趋势 ,而甲基对硫磷对红铃虫仍然有效。适当使用甲基对硫磷或开发其它杀虫剂替代菊酯类农药应作为防治红铃虫的主要对策。
The results of virulence test showed that compared with 1994, the resistance of pink bollworm to deltamethrin and fenvalerate in 1998 increased by 72.6 times and 64 times respectively, while the resistance to methyl parathion Sensitivity increased nearly 10 times. Due to the prevention and treatment of cotton bollworm, cotton bollworm excessive use of pyrethrum pesticides, deltamethrin and other pyrethrum insecticides to control the field effect of pink bollworm showed a rapid decline in recent years, the trend of methyl parathion on red bell The bug is still valid. Appropriate use of methyl parathion or the development of alternative insecticides to pyrethroid pesticides should be the primary strategy for the control of pink bollworm.