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[目的]为指导白背飞虱田间药剂使用,采用稻茎浸渍法测定了湖南省长沙市白背飞虱种群对5种杀虫剂的敏感性。[结果]白背飞虱对噻虫嗪、吡虫啉、噻嗪酮、烯啶虫胺、异丙威的敏感度(LC50)分别为0.026 1、0.053 4、0.088 4、0.175 9、27.366 1 mg/L。[结论]根据室内测定的敏感度以及药剂作用特性,在生产上可视白背飞虱发生情况,选择不同杀虫剂交替使用,以避免白背飞虱对杀虫剂敏感度的降低。
[Objective] The research aimed to guide the use of pesticides in white field planthopper, and the susceptibility of the white -backed planthoppers population to 5 insecticides in Changsha, Hunan Province was determined by rice stem dipping method. [Result] The results showed that the sensitivity of whitebacked planthoppers to thiamethoxam, imidacloprid, buprofezin, nitenpyram and isoprocarb were 0.026, 1.053 4, 0.088 4, 0.175 9 and 27.366 respectively, L. [Conclusion] According to the sensitivity of indoor determination and the characteristics of drug action, the occurrence of whitebacked planthopper (Sogatella furcifera) could be visualized in production and different insecticides were used alternately to avoid the decrease of insecticide sensitivity of Sogatella furcifera.