【摘要】 应用昆虫生命表技术,评价4种生物杀虫剂对杨扇舟蛾种群的控制作用。结果表明,0.3%印楝素乳油、1.8%阿维菌素乳油和Bt乳剂对杨扇舟蛾种群直接毒杀作用较好,但只施用1次不能将1代杨扇舟蛾种群趋势指数(I)降至1.000以下。0.3%印楝素乳油+Bt乳剂、0.3%印楝素乳油+1.8%阿维菌素乳油,对杨扇舟蛾的联合控制作用显著,I值均小于1.000,同时表明4种生物杀虫剂对天敌无毒副作用。更多还原

【Abstract】 The effects of biological insecticides against Clostera anachoreta(Denis & Schiffermüller)were evaluated with the insect life table.The results indicated that azadirachtin 0.3% EC,abamectin 1.8% EC and Bt EO were more effective.The indexes of population trend(I-value) were above 1.000 when the biological agents were applied only once.However,combined efficacy of two insecticides(i.e azadirachtin+abamectin,azadirachtin+Bt) had significantly control effects.The I-values were much lower than 1.000.And the 4 biological insecticides were safe to natural enemies.更多还原