亚致死剂量杀虫剂对异色瓢虫捕食作用的影响

为探讨害虫化学防治与生物防治的协调技术，提高综合防治水平，测定了吡虫啉，鱼藤酮，氰戊菊酯和阿维菌素A种杀虫剂亚致死剂量对异色瓢虫成虫捕食桃蚜功能反应的影响。亚致死剂量杀虫剂对异色瓢虫功能反应模型的基本结构没有改变，但影响到了模型的各项参数，药剂处理后异色瓢虫最大日捕食量降低，处理猎物的时间延长，捕食速率和寻找效应一般也被减弱，影响结果还与异色瓢虫受药的方式有关，4种药剂中以氰戊菊酯的影响最大，鱼藤酮的胃毒作用也较明显，研究结果表明亚致死剂量的杀虫剂对天敌异色瓢虫的捕食作用存在着不良影响，这为害虫治理中如何协调利用化学防治和生物防治措施，指导科学用药提供了一定的理论基础。

Effects of Sublethal Doses of Insecticides on Predation of Multicolored Asian Ladybird Harmonia axyridis (Pallas) (Cole- optera: Coccinelliodae)

Insecticides and natural enemies are the two main means to control insect pests at present. A problem is coming that after spraying of insecticides in the field, some natural enemies were inevitably influenced at lethal or sublethal degree. In order to seek better techniques for coordinating the chemical and biological control measures, and improve the level of integrated pest management, effects of sublethal doses of four insecticides, i.e., imidacloprid, rotenone, fenvalerate and abamectin, on the functio...