摘要
本试验评价了11种杀虫剂(分属有机磷、拟除虫菊酯、氨基甲酸酯、昆虫生长调节剂、杀虫抗生素、沙蚕毒素及微生物农药)对菜蛾啮小蜂的影响。供试浓度为田间防治推荐浓度,用试管药膜法测定农药对成虫的毒性,用浸渍法测定农药对蛹的影响。结果表明,农药对成虫的击倒能力的顺序依次为:辛硫磷≌万灵>巴丹>乐果>敌杀死≌功夫>害极灭≌虫螨光>杀灭菊酯>抑太保≌Bt;其触杀活性的顺序为:辛硫磷≌乐果≌万灵>敌杀死≌功夫≌巴丹>害极灭≌虫螨光>杀灭菊酯>抑太保≌Bt。供试的5种杀虫剂(即乐果、杀灭菊酯、虫螨光、抑太保和Bt)不影响菜蛾啮小蜂蛹的发育和羽化,但乐果对羽化后的成虫有极高的毒性。
Toxicity of eleven commonly used insecticides (including organophosphates, synthetic pyrethroids, carbamates, insect growth regulators, antibiotics, nereistoxin and microbial insecticides) to Oomyzus sokolowskii was evaluated in the laboratory. All insecticides were applied at concentrations recommended for field application by the producers. Adults were exposed to fresh, dry insecticide film in glass vials for 05, 2 and 24 h, respectively, and were then transferred to clean vials and kept for a further 24 h for observation. Pupae were dipped into insecticides for 10 s, and emergence of adults and the mortality 24 h after emergence were recorded. Results showed that the rates of knockdown by the insecticides to adults were in the following decreasing order: phoxim≌methomyl>cartap>dimethoate>deltamethrin≌cyhalothrin>abamectin≌avermectin>fenvalerate>chlorfluazuron≌Bt, and the order of contact toxicity to the adults were: phoxim≌dimethoate≌methomyl>deltamethrin≌cyhalothrin>cartap>abamectin≌avermectin>fenvalerate>chlorfluazuron≌Bt. Five insecticides (dimethoate, fenvalerate,avermectin, chlorfluazuron and Bt) were shown to be harmless to the pupae, however, dimethoate was toxic to the adults emerging from the treated pupae.
出处
《中国生物防治》
CSCD
1998年第3期97-100,共4页
Chinese Journal of Biological Control
基金
澳大利亚国际农业研究中心资助
关键词
杀虫剂
小菜蛾
菜蛾啮小蜂
毒性
Plutella xylostella Oomyzus sokolowskii insecticides toxicity