关键词: 三氟氯氰菊酯, 家蝇, 毒力, 影响因子, 生测技术

Abstract: Objective:To study the toxicity and influencing factors of cyhalothrin against housefly Musca domestica.Method:To test it in the laboratory using the topical microapplcation and cylinder spraying technique.Results:It was showed that LCV₅₀ values based upon the decreasing order was cyhalothrin(0.0131μg/fly)>pirimiphosmethyl(0.9066μg/fly)>BPMC(31.58μg/fly)>trichlophon(54.67μg/fly) and KTV₅₀ values was cyhalothrin(4.44 min)> pirimiphosmethyl(5.17min)>trichlophon(6.08 min)>BPMC(6.17 min);Synergistic coefficent(SC) of seven synergists to cyhalothrin was TPP>PB >SVV₁>DANTONG>GUANGXIAOYE>DEM>SVV₂.Cyhalothrin had a strongest toxicity against adult housefly at the temperature of 18℃,its LDV₅₀ value was 2.15-fold and 3.69-fold at 24℃ and 30℃,respectively,indicating that cyhalothrin was a very effective pyrethroid with a negative temperature effect.Surfactants such as Tween80,Span85 and mixed emulsifier 0206 significantly increased the contact toxicity of cyhalothrin to housefly,their SC was 138.19,183.58 and 125.96,respectively,but sopa 270 had no obvious effect on the toxicity of cyhalothrin.Conclusion:The effectiveness was twice more effective by means of using cyhalothrin together with the sinergist and surfactant.