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目的 观察国产杀虫剂大功达对印鼠客蚤的实验室毒效和现场灭效。方法 实验室用瓶膜法 ,现场用滞留喷洒法。结果 ( 1)当药物浓度为 0 .0 0 2 5 %时 ,KT50 为 3 .77( 3 .40～ 4.15 )min ;药物浓度为 0 .0 0 5 %和 0 .0 1%时 ,KT50分别为 3 .17( 2 .88～ 3 .48)min和 3 .45 ( 3 .2 5～ 3 .65 )min。 ( 2 )当药物浓度在 0 .0 0 2 5 %、0 .0 0 5 %、0 .0 1%时 ,印鼠客蚤 2 4h死亡率均为 10 0 %。 ( 3 )持效 :药膜在室温和普通湿度下存放 9个月后 ,药物浓度在 0 .0 0 2 5 %以上时 ,印鼠客蚤 2 4h死亡率均为 10 0 %。 ( 4 )现场 2d灭效 :使用 0 .0 3 %浓度对地面游离印鼠客蚤的校正灭蚤率为 80 .80 %。 ( 5 )现场残效 ( 2 9d) :使用 0 .0 3 %浓度对地面游离印鼠客蚤的校正灭蚤率为 93 .87%。结论 大功达 8%可湿性粉剂毒力强 ,现场灭效好 ,气味小 ,对人畜安全 ,可在控制家鼠鼠疫灭蚤中推广使用
Objective To observe the laboratory toxic effects of domestic insecticide Dagongda on the rat flea and to eliminate the effects. Methods Laboratory bottle membrane method, the scene with detention spray method. Results (1) KT50 was 3.77 (3.40-4.15) min when the drug concentration was 0.002 5%, and KT50 was respectively 0.0005% and 0.01% at drug concentration Was 3.17 (2.88 ~ 3.48) min and 3.45 (3.5 ~ 3.565) min. (2) When the drug concentration was 0. 0 2 5%, 0 0 0 5%, 0 0 1%, the 24 h mortality rate was 100%. (3) Persistence: After the drug film was stored at room temperature and ordinary humidity for 9 months, the death rate of the cloned rabbit flea at 24 h was 100% when the drug concentration was above 0.0025%. (4) Field 2d off: The corrected flea flea flee rate of 80.0% against 0% of ground-free rat fleas. (5) In-scene residual effect (29d): The correct flea-killing rate of the flea on the ground-free rat was 0.03% with a concentration of 0.03%. Conclusion Dafeng 8% wettable powder has strong virulence, good on-site killing effect, small odor and is safe for humans and animals and can be widely used in the control of domestic rats and mice fleas