摘要
测定了 5种药剂对棉蚜Aphisgossypii抗氰戊菊酯、吡虫啉品系和敏感品系取食棉花、黄瓜和石榴的后代的毒力 ,并对它们的后代体内乙酰胆碱酯酶和羧酸酯酶的比活力做了初步探索。结果表明 ,氰戊菊酯抗性品系取食棉花比取食黄瓜的后代对氰戊菊酯的抗性大 76 4倍 ,对灭多威、氧乐果、硫丹和吡虫啉的抗性也大 0 5～ 4 6倍 ;取食石榴的后代对 5种药剂的抗性介于取食棉花和黄瓜的之间。吡虫啉抗性品系的测定结果与氰戊菊酯抗性品系基本一致。敏感品系取食黄瓜比取食棉花的后代对 5种药剂的敏感性更高。 3个品系取食不同植物的后代相比 ,其体内乙酰胆碱酯酶的比活力 ,取食棉花的为取食黄瓜的 2 4～ 2 8倍 ;羧酸酯酶的比活力 ,取食棉花的为取食黄瓜的 1 8～ 2 4倍。证明棉蚜的抗性和敏感品系取食的寄主植物不同 ,可引起对药剂敏感性的变化。乙酰胆碱酯酶和羧酸酯酶活力的变化均是引起这种变化的重要因素。
The susceptible strain and the resistant strains R-fenvalerate and R-imidacloprid of the cotton aphid (Aphis gossypii) were reared with three different host plants:cotton, cucumber and pomegranate. The toxicity of five insecticides to the decendants of the cotton aphid and the relevant enzymic activity were measured. The results showed that the resistance of the progeny of R-fenvalerate strain feeding on cotton was 67 4- folds higher than that feeding on cucumber for fenvalerate,and 0 5～4 6 folds for other four insecticides. When feeding on pomegranate this strain showed moderate resistance.The R-imidacloprid strain feeding on the three host plants showed the same tendency in resistance to the five insecticides as the R-fenvalerate strain. The sensitivity of the susceptible strain feeding on cucumber to the tested insecticides was higher than that feeding on cotton. AChE and CarE activities of different strains feeding on cotton were higher than feeding on cucumber (AChE:2 4～2 8 times;CarE:1 8～2 4 times). The results demonstrated that feeding on different host plants might cause the change in sensitivity to insecticides in the resistant and susceptible strains of the cotton aphid One of the major factor causing the resistance changes was the alteration in AChE and CarE activities.
出处
《昆虫学报》
CAS
CSCD
北大核心
2001年第4期469-475,共7页
Acta Entomologica Sinica
基金
山东省科委资助项目 (972 30 6 )
