【摘要】 试验用臭椿、木槿、泽漆等三种植物浸提的水剂对甘蓝蚜进行室内毒力测定 ,测定方法采用虫体与饲料同时喷药 ,毒力效果由胃毒作用和触杀作用共同构成。结果表明 ,臭椿根 4倍液对甘蓝蚜杀虫效果最高 ,达 90 .6% ,木槿皮 2倍液对甘蓝蚜杀虫效果为 87.8% ,泽漆 2倍液对甘蓝蚜杀虫效果为 84.9% ;三种植物浸提的水剂对甘蓝蚜的杀虫适宜浓度分别为 :臭椿根 4倍、泽漆 2倍、木槿皮 2倍。三种植物中臭椿最具研究开发潜力。更多还原

【Abstract】 The experiment is to measure the toxin ability of ailanthus altissima swingle?hibiscus syriacus linn and euphorbia helioscopia linn on cabbage aphid(Brevicorgne brassicae).The measuring method is to make use of the insects and forages to spray drugs at the same time.the results show: The 4 times solution of ailanthus altisima swingle has the best kill insects effect(90.6%).The kill insects rate of the 2 times solution of hibiscus syriacus linn can reach 87.8%.The kill insects rate of the 2 times solution of euphorbia helioscopia linn can reach 84.9% . So of the three plants, ailanthus altissima swingle has the best extracting potential.更多还原