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用点滴法测定了二氯苯醚菊酯等7种药剂对天幕毛虫5龄幼虫的毒力。其LD50(微克/头)以二氯苯醚菊酯最强为0.007079,杀灭菊酯为0.07079,辛硫磷为0.2754,敌敌畏为0.9330,敌马合剂为2.3180,马拉硫磷为4.2660,敌百虫最弱为5.2480。柞蚕场小区防治试验,用药剂量二氯苯醚菊酯及杀灭菊酯为0.05毫升/66米~2,其余的药剂除敌百虫为0.5克/66米~2外,均为0.5毫升/66米~2。其防治效果二氯苯醚菊酯最高,平均校正死亡率为92.7％,杀灭菊酯为90.8％,辛硫磷为89.2％,敌敌畏为86.9％,敌马合剂为78.3％,马拉硫磷为76.3％,敌百虫为53.4％,杀虫双为48.6％,灭幼脲最低为33.2％。试验表明,二氯苯醚菊酯及杀灭菊酯的防效最高,敌百虫、杀虫双较差;灭幼脲最差。
The toxicity of 7 pesticides, such as Permethrin, to the 5th instar larvae of the Anteaterial Caterpillar, was determined by the drip method. The LD50 (microgram / head) to permethrin strongest was 0.007079, fenvalerate 0.07079, phoxim 0.2754, dichlorvos 0.9330, enemy horse mixture 2.3180, malathion 4.2660, the enemy The weakest worm is 5.2480. Tussah field plot prevention and control test, the dose of permethrin and fenvalerate 0.05 ml / 66 m ~ 2, the rest of the drug trichlorfon in addition to 0.5 g / 66 m ~ 2, were 0.5 ml / 66 meters ~ 2. The control efficacy of Permethrin was the highest, with an average corrected mortality of 92.7%, fenvalerate 90.8%, phoxim 89.2%, dichlorvos 86.9%, anti-malaria 78.3%, malathion Was 76.3%, trichlorfon was 53.4%, insecticidal double was 48.6%, and the lowest of diflubenzuron was 33.2%. Experiments show that permethrin and fenvalerate control the highest efficacy, trichlorfon, insecticidal double poor; the worst biuret.