【摘要】 通过几种杀虫剂对棉蚜的毒力比较研究,结果表明:棉蚜对拟除虫菊酯类杀虫剂抗性最强,2.5%溴氰菊酯乳油对棉蚜的LC50高达857.39m g.L-1;棉蚜对1.8%阿维菌素乳油、10%吡虫啉可湿性粉剂最为敏感,其LC50分别为0.20m g.L-1和1.41m g.L-1;对有机磷类杀虫剂产生了轻度抗性,对氨基甲酸酯类杀虫剂产生了一定程度的抗性。经过对供试农药的LC50对比,筛选出阿维菌素和吡虫啉对棉蚜有特效,久效磷和氧化乐果对棉蚜有一定的防效,拟除虫菊酯类杀虫剂对棉蚜的防效极差。更多还原

【Abstract】 The result showed that resistance of cotton aphid to pyrethroids insecticide was in high level among several kinds of insecticides through toxic comparison,LC₅₀ of 20% deltamethrin against cotton aphid was 857.39 mg·L^-1;cotton aphid was sensitive to abamectin and imidacloprid.Their LC₅₀ were respectively 0.20 mg·L^-1 and 1.41 mg·L^-1,yielded resistance to organphosphate insecticide and carbamates insecticide in some degree,their LC₅₀ were respectively 22.06 mg·L^-1 and 179.4 mg·L^-1.In chemical controlling cotton aphid,abamectin and imidacloprid insecticide should be utilized firstly.更多还原