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1993-1996年用点滴法和浸叶法分别测定了几个县棉铃虫对溴氰菊酯,氯氰菊酯,灭多威,久效磷的抗性水平,其结果溴氰菊酯LD50分别为0.00959,0.01612,0.02360ug/头,氯氰菊酯LD50分别为0.5570,0.08590,0.7559ug/头,与敏感基线标准比较,棉铃虫对溴氰菊酯的抗性瑙为13.70,23.00,33.71;