氯氰菊酯和B.t.iH-14混配杀虫剂对致乏库蚊幼虫的实验室毒效及持效作用研究  

Study on Abiding Efficiecy of Cypermethrin and Bacillus Thuringensis Mixture Insecficide to Culex pipiens quinque facciatus in laboratory

作　　者：耿文奎[1] 冯向阳[2] 黄丽华[2] 陆裕宽[2] 苏星[2] 

机构地区：[1]广西壮族自治区卫生厅,南宁530021 [2]广西壮族自治区卫生防疫站

出　　处：《中国媒介生物学及控制杂志》2001年第3期192-194,共3页Chinese Journal of Vector Biology and Control

摘　　要：目的 :研究混配杀虫剂对致乏库蚊幼虫的实验室毒效及持效作用。方法 :将 3种药物稀释成不同浓度 ,测定致乏库蚊幼虫的LC50 。结果 :混剂对敏感品系致乏库蚊幼虫LC50 为 0 .0 0 5 6mg/L ,共毒系数为 90 .8,毒力表现为两者相加作用 ;对抗性致乏库蚊幼虫LC50 为 0 .0 5 45mg/L ,共毒系数为2 84.0 3 ,有明显增效作用。 2 .5mg/L浓度对敏感品系和抗性品系的灭效 >80 % ,在实验室的持效时间为 2 1d ,持效长于单独使用 0 .5mg/L氯氰菊酯和2 .0mg/LB .t .iH - 14;混剂在 2 1d后灭效迅速下降 ,30d基本失效。结论 :该混剂既可快速有效地杀灭抗性幼虫 ,同时可延长杀灭残效 ,对提高防制效果。Objective: To study on the mixture insecticide efficacy against Culex pipiens quinquefaciatus larva. Method: Determining the LC 50 . Result: Cypermethrin and Bacillus thuringensis mixture insecticide to sensitive Culex pipiens quinguefaciatus larva LC 50 was 0.005 6 mg/L, the guotiety was 0.98 , which to resistant Culex pipiens quinquefaciatus larva LC 50 was 0.054 5 mg/L, the toxicity quotiety was 284.03 ,they have obvious synergistic action. Concoulion:On the dosage of 2.5 mg/L consistancy to sensitive and resistant type,the killing efficiency was over 80% in the laboratory and validity time was 21 days. The efficiency quotiety was longer than that with 0.5 mg/L Cypermethrin and 2.0 mg/L B.t.i.H-14. But after 21 days, mixture insecticide efficiency quickly decreased. One month later, it was out of action.

关 键 词：氯氰菊酯 B.t.iH-14混配制剂 致乏库蚊 毒效 杀虫剂 持效 

分 类 号：R979.8[医药卫生—药品] R184.31[医药卫生—药学]