关键词: JWX-Ⅱ型卫生杀虫剂, 超低容量喷雾, 淡色库蚊, 家蝇

Abstract: Objective To evaluate the killing effects of ultralow-volume spraying of hygienic insecticide JWX-Ⅱ on mosquitoes and flies. Methods Laboratory test, simulated field test, and field test were carried out to evaluate the killing effects of hygienic insecticide JWX-Ⅱ on Culex pipiens pallens and Musca domestica. Results In the laboratory test, the KT₅₀ values of JWX-Ⅱwere 4.39 min and 3.79 min for Cx. pipiens pallens and M. domestica when diluted 100 times with water and sprayed at 1.43 ml/m³; the death rates of both insects were 100% within 24 h. In the simulated field test, JWX-Ⅱ was sprayed at a dose of 0.5 mg·ai/m² and a distance of 5, 10, 15, or 20 m; the 1 h knock down rates and 24 h death rates were more than 95% for both insects when JWX-Ⅱ was sprayed at a distance of 10 m. In the field test, JWX-Ⅱ was sprayed at 0.5 mg·ai/m² in four encampments for field training of troops; the density of mosquitoes decreased on average by 95.69% one hour after spraying. Conclusion Hygienic insecticide JWX-Ⅱ has the advantages of high efficiency, quick acting, low toxicity, and no offensive odor and is suitable for ultralow-volume spraying.

Key words: Hygienic insecticide JWX-Ⅱ, Ultralow-volume spraying, Culex pipiens pallens, Musca domestica