小菜蛾对阿维菌素和高效氯氰菊酯及其复配剂的抗性

Resistance of Plutella xylostella Lines Against Abamectin,Beta-cypermethrin and Their Mixture

为了评估小菜蛾对阿维菌素和高效氯氰菊酯复配杀虫剂的抗药性风险,采用阿维菌素、高效氯氰菊酯、阿维菌素与高效氯氰菊酯复配剂分别对小菜蛾进行逐代抗性选育至F35代,并在选育过程中对3个小菜蛾抗性品系进行抗性测定。结果表明:小菜蛾阿维菌素抗性品系的抗性指数增长最慢,且趋于平缓,高效氯氰菊酯的抗性增长最快,也最高,抗性达到极高水平,复配剂品系介于两者之间,抗性也达极高水平。

Abamectin,beta-cypermethrin and their mixture were used to study resistance of different P .ylostella generations （from F 0 to F35 ）against abamectin, beta-cypermethrin and their mixture respectively and three P .xylostella lines with resistance to abamectin,beta-cypermethrin and their mixture were determined.The results showed that the index of P .xylostella line with resistance to abamectin increases slowly with increase of breeding generations,the index of P .xylostella line with resistance to beta-cypermethrin rises very fast with increase of breeding generations and their resistance is up to the highest level,but the index of P .xylostella lines with resistance to abamectin and beta-cypermethrin mixture is between P .xylostella line with resistance to abamectin and P .ylostella line with resistance to beta-cypermethrin and the resistance reaches the highest level also.