功高对印鼠客蚤杀灭效果试验研究

Studies on the Toxicity of Cyhalothrin to Xenopsylla cheopis

目的观察杀虫剂功高对印鼠客蚤的实验室杀灭效果。方法瓶膜法。结果(1)随着药物浓度的逐渐增加,KT50呈现有规律的缩短,24 h死亡率也逐渐增高。(2)浓度为12.50 mg/L以上时,KT50在11 min时击倒率均大于88%,24 h死亡率均在80%以上。(3)50.00、100.00 mg/L 2种浓度450 d内残效实验30 min内的击倒率均为100%,24 h死亡率均大于93%。结论功高2.5%乳油对印鼠客蚤杀灭效果较好,具有高效、速杀、残效好等优点,可用于大面积灭蚤。

Objective The paper reported the results ot study on the toxiticy of cyhalothrin to Xenospylly cheopis in laboratory. Methods The residual smearing method was used. Results （1） The KT50 was getting shorter with the concentration gradually creasing, and the death rates of 24 h were getting higher. （2） When the concentration of cyhalothrin were 12.50 mg/L, 25.00 mg/L, 50.00 mg/L and 100.00 mg/L, the KT50〈6 minutes, and the knock down rates of 11 minutes 〉 63.0%, the death rates of 24 h 〉 84.0%. （3） When the concentration of cyhalothrin were 50.00 mg/L and 100.00 mg/L, the shoot down rates of 30 minutes in 450 days were 100% and the death rates of 24 h in 450 days 〉93.0% , Conclusion The toxicticy of cyhalothrin to Xenospylly cheopis is very good and cyhalothrin can be used to control the plague in field.