杀虫剂与增效剂混用对现场淡色库蚊幼虫的杀灭效果

The research on the killing effect of insecticides mixed with synergist for Culex pipiens pallens larvae in field

目的探讨杀虫剂与增效剂混用对现场淡色库蚊幼虫的杀灭效果，为合理有效地进行蚊虫化学防治提供依据。方法参照WHO生物测定方法和唐振华药物联合作用试验方法，将敌敌畏、残杀威,氯氰菊酯分别与氧化胡椒基丁醚（S1）、八氯二丙醚（S2）、增效胺（MGK264）混用，测试3个现场淡色库蚊种群幼虫死亡率，计算增效系数。结果敌敌畏与S1、S2和MGK264混用的增效系数依次为255．44～617．60、416．24～1475．97和109．40～173．30，残杀威与sl、s2和MGK264混用的增效系数依次为335．27～487．95、329．56～948．79和122．08～187．23，氯氰菊酯与S1、S：和MGK264混用的增效系数依次为304．15～471．35、232．24～252．65和246．95～404．40。结论杀虫剂与增效剂混用可对现场淡色库蚊幼虫起到明显的杀虫增效作用，选择杀虫效力较强的配方可提高蚊虫防制效果。

Objective To study the effect of insecticide mixed with synergist to kill Culex pipiens patlens larvae in field and provide a scientific and rational basis for the chemical prevention and control of mosquito. Methods According to WHO bioassay method and Tang Zhenhua unification drug test method, dichlorvos, propoxur and cypermethrin were mixed with oxidation piperonyl butoxide （ S1）, octachlorodipropyl ether （S2） and synergy amine （ MGK264 ） respectively, then bioassay was tested on Culex pipiens pallens larvae at 3 spots in field and the synergism coefficients were calculated. Results The synergism coefficient of dichlorvos mixed with S1, S2 and MGK264 were 255.44-617.60,416.24-1 475.97 and 109.40-173.30 respectively. The synergism coefficient of propoxur mixed with S1, S2 and MGK264 were 335.27-487.95, 329.56-948.79 and 122.08-187.23 respectively. The synergism coefficient of cypermethrin mixed with S1, S2 and MGK264 were 304.15-471.35,232.24-252.65 and 246.95-404.40 respectively. Conclusion The obvious synergy effects were observed in the mixture of pesticides and synergist for killing of Culex pipiens pallens larvae, and the strong insecticidal effect formula can improve the effect of mosquito control.