六种药剂对香蕉球茎象甲成虫的室内毒力及药效研究

Indoor Toxicity and Efficacy of Six Insecticides Against the Adults of Cosmopolites sordidus Germar

以香蕉球茎象甲为试虫,采用浸香蕉球茎接虫法和点滴法,研究了6种药剂对其成虫的毒力和室内药效。结果表明:6种药剂对香蕉球茎象甲成虫的毒力依次为高效氯氟氰菊酯>异丙威>敌百虫>吡虫啉>啶虫脒>阿维菌素,24h的LC50值分别为22.847 2、45.460 1、110.695 7、158.669 7、192.486 1、218.659 3mg/L;室内药效结果表明,药后14d,除敌百虫外,高效氯氟氰菊酯、异丙威、吡虫啉、啶虫脒和阿维菌素对香蕉球茎象甲成虫的校正死亡率均达到100%,且高效氯氟氰菊酯和异丙威的速效性好,而吡虫啉、啶虫脒和阿维菌素的药效持续期长。高效氯氟氰菊酯、异丙威、吡虫啉、啶虫脒和阿维菌素均可作为田间防治香蕉球茎象甲的潜力药剂。

Taking Cosmopolites sordidus as test insect,the indoor toxicity and efficacy of six insecticides to the adults of C.sordidus were tested by corm-dipping method and topical application method respectively.The results showed that the toxicity of six insecticides to C.sordidus adults from the highest to the lowest could be arranged by：lambda-cyhalothrin〉isoprocarb〉trichlorphon〉imidacloprid〉acetamiprid〉abamectin,and the LC50 values of 24 hwere 22.847 2,45.460 1,110.695 7,158.669 7,192.486 1,218.659 3 mg/L,respectively.The indoor efficacy trials showed that the corrected mortality of all the tested insecticides but trichlorphon on C.sordidus adults reached 100% in the 14 days after treatment.Moreover,lambda-cyhalothrin and isoprocarb had better instant effect,and imidacloprid,acetamiprid and abamectin had longer persistence.Lambda-cyhalothrin,isoprocarb,imidacloprid,acetamiprid and abamectin could be used as potential insecticides to control C.sordidusin field.