对蚊蝇和蟑螂有效防治药剂的筛选研究

目的掌握多种药剂对淡色库蚊、家蝇和德国小蠊的杀灭效果,为有效控制媒介生物提供依据。方法在室内条件下分别采用幼虫浸渍法、微量点滴法、三角烧瓶药膜法。结果溴氰菊酯对淡色库蚊幼虫敏感性最高,毒力最大,LC50为0.009 1 mg/L;高效氯氟氰菊酯次之,LC50为0.012 6 mg/L;胺菊酯毒力较弱。家蝇对高效氯氟氰菊酯敏感性同样最高,LD50为0.008 3μg/♀,残杀威毒力最弱。高效氯氟氰菊酯、溴氰菊酯和仲丁威对德国小蠊的KT50分别为10.24、10.85和12.96 min,毒力较强。结论家蝇、德国小蠊对高效氯氟氰菊酯的敏感性最高,淡色库蚊幼虫对溴氰菊酯的敏感性最高,但高效氯氰菊酯的杀灭效果强于其他。

Screening effective insecticides for controlling mosquito, fly and cockroach

Objective The effect of four kinds of insecticides against Culex pipiens pallens,Musca domestica and BlatteUa germanica were determined, in order to provide scientific data for vector control. Methods Under labora- tory conditions, using soaking, topical application and residual smearing methods. Results The LCs0 of delta- methrin to mosquito was 0. 009 1 mg/L, and the toxicity was the highest. The toxicity of lambda-cyhalothrin was the second and its LCs0 to mosquito was 0. 012 6 mg/L. The toxicity of tetramethrin was the lowest. The LDs0 of lambda- cyhalothrin was 0. 008 3 txg/9 to fly. Propoxur was the lowest toxicity. For cockroach, the KTs0 of lambda-cyhalo- thrin, deha-methrin and fenobucarb were 10.24,10.85 and 12.96 min respectively. Conclusion For fly and cockroach, the toxicity of lambda-cyhalothrin was the highest. The toxicity of deha-methrin to mosquito was the stron- gest. The control effect of beta-cyfluthrin was the best of them.