甜菜夜蛾的抗药性调查与研究

采用FAO推荐的微量点滴法，以室内饲养的甜菜夜蛾Spodoptera exigua Huebner武汉敏感品系为标准，测定了河北隆窑，江苏徐州，山东章丘和泰安，上海郊区5个甜菜夜蛾田间种群对4种代表药剂的抗性水平，比较了4种非常用药剂对3个田间种群的杀虫毒力。结果表明，隆窑，章丘，泰安，徐州和上海郊区5个田间种群4龄幼虫对顺式氯氰菊酯的抗性分别达615．2，544．2，465．8，445．3和435．4倍，对灭多威的抗性分别达213．0，206．1，116．0，0，96．5和89．6倍，对丙溴磷的抗性分别达56．3，48．8，45．3，44．3和38．2倍，对氟啶脲的抗性分别达20．3，18．8，16．0，14．3和13．5倍，抗性已十分严重，4种非常用药剂对上海郊区、山东章丘和泰安3个种群的毒力差异不大。

Studies and surveys on the insecticides resistance of Spodoptera exigua

One sensitive Spodoptera exigua population and five resistant populations from Longyao (Hebei Province), Zhangqiu(Shandong Province) , Tai'an (Shandong Province), Xuzhou(Jiangsu Province) and Shanghai were collected for testing by topical application and their resistance to insecticides were compared. The results showed that the resistance of 4th-instar larvae of five field populations to alpha-cypermethrin, methomyl, profenophos and chlorfluazuron was very high. The toxici-ty of the four uncommonly used insecticides ( pirate, abamectin, diafenthiuron and endosulfan) to three populations from Shanghai, Tai' an and Zhangqiu was almost the same.