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

摘要： 目的 测定JWX-Ⅱ型卫生杀虫剂超低容量喷雾对淡色库蚊、家蝇的杀灭效果。方法 以淡色库蚊、家蝇为试验对象, 对JWX-Ⅱ型卫生杀虫剂进行室内药效、外环境模拟现场药效、现场药效测定。结果 该杀虫剂用水稀释100倍后, 室内按1.43 ml/m³喷雾, 对淡色库蚊、家蝇的KT₅₀分别为4.39和3.79 min, 24 h死亡率均为100%;外环境模拟现场距离喷药点5、10、15、20 m按0.5 mg·ai/m²喷药, 10 m内对淡色库蚊、家蝇的1 h击倒率和24 h死亡率均在95%以上;现场对部队野外驻训的4个宿营地按0.5 mg·ai/m²喷药, 喷药后1 h蚊虫密度下降率平均达95.69%。结论 该药剂高效、速效、低毒、无异味, 适合超低容量喷雾。

关键词: JWX-Ⅱ型卫生杀虫剂, 超低容量喷雾, 淡色库蚊, 家蝇