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期 刊 ：植物保护学报 1999年

关键词：棉铃虫；Bt预处理；氰戊菊酯；抗药性；发育期；种群；

Keywords:cotton bollworm, Bt, fenvalerate, resistance,

摘 要 ：用一定剂量的Ｂｔ制剂处理不同种群，不同发育期的棉铃虫、２４ｈ后测定它们对氰戊菊酯的反应。结果表明，不管是抗性种群还是敏感种群，棉铃虫经Ｂｔ预处理后与未处理对照相比，都表现为２－４龄幼虫的敏感性明显提高，而卵，初卵、１龄末幼虫敏感性变化不明显，ＤＥ－Ｒ种群敏感性变化幅度〉９６ＨＮ－Ｒ种群〉ＹＺ－Ｓ种群；以ＹＺ－Ｓ为第三偌线比较９６ＨＮ－Ｒ种群和ＤＥ－Ｒ种群的抗性倍数变化，发现卵和１龄幼虫经Ｂｔ预自理

Abstract:After pretreated on different stages with definite dosage of Bt for 24h, the change of response to fenvalerate in three populations of cotton bollworm (CBW), Heli-caverpa armigera (Hubner) were detected. The results showed that the sensitivities of 2nd to

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