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测定了氰戊菊酯和顺式氰戊菊酯对不同棉铃虫品系３龄幼虫的毒力。结果表明，两者对敏感品系的ＬＤ５０值相差８．７倍，而对一系列抗性品系两者ＬＤ５０值相差２４．３～１７２．１倍；不同棉铃虫品系对氰戊菊酯和顺式氰戊菊酯的抗性水平也存在显著差异，对氰戊菊酯的抗性为８１．８～２１４２．８倍，对顺式氰戊菊酯的抗性为２３．８～１６４．６倍。用室内选育的山东阳谷Ｓ６抗性品系进行测定，结果显示，增效醚对氰戊菊酯和顺式氰戊菊酯的增效比分别为１１９．３和４．３，说明棉铃虫对两者的氧化代谢抗性机制差异很大。氰戊菊酯和顺式氰戊菊酯对棉铃虫的毒力以及棉铃虫对两种药剂的抗性水平并不是简单的４倍关系，氰戊菊酯中大量无效异构体的存在可能有利于氧化代谢抗性机制的演化。
Toxicity of fenvalerate and cis-fenvalerate to 3rd-instar larvae of different cotton bollworm strains was determined. The results showed that the LD50 value of the susceptible strain was 8.7 times lower than that of the susceptible strain, while the value of LD50 was 24.3 ~ 172.1 times lower than that of the susceptible strain. The insecticidal activity of fenvalerate and cis-cyanide There was also a significant difference in the level of fenvalerate resistance. The resistance to fenvalerate was 81.8-2142.8 times and that of cis-fenvalerate was 23.8-164.6 times. The results showed that the synergistic ratios of fenvalerate and cis-fenvalerate were 119.3 and 4.3, respectively, indicating that the bollworm pairs Oxidative metabolism between the two mechanisms vary widely. The virulence of fenvalerate and cis-fenvalerate against H. armigera and the resistance of H. armigera to the two agents are not a simple 4-fold relationship. The presence of large numbers of inactive isomers in fenvalerate may be advantageous The evolution of oxidative metabolism resistance mechanism.