目前国内生产的氯氰菊酯依杀虫活性有氯氰菊酯和高效氯氰菊酯之分。后者是从前者出发,通过差向异构化,将其无效反体氯氰菊酯转化成有效体氯氰菊酯,以而杀虫活性明显提高。据报导,氯铱菊酯、敌百虫或敌敌畏或乙酰甲胺磷混配对家蝇均有增效作用。本文研究敌百虫、氯氰菊酯及高效氯氰菊酯混配对家蝇的毒效。 At present, the domestic production of cypermethrin insecticidal activity of cypermethrin and beta-cypermethrin. The latter is based on the former, through the epimerization, the conversion of its ineffective anti-cypermethrin into effective cypermethrin, the insecticidal activity was significantly improved. It has been reported that imidacloprid, trichlorfon or dichlorvos or acephate is synergistic to house flies. In this paper, the toxic effects of trichlorfon, cypermethrin and beta-cypermethrin on housefly were studied.