[目的]了解2012年贵州省贵阳、遵义、平塘、平坝和黔西5地白背飞虱种群对7种常用杀虫剂的敏感性。[方法]稻茎浸渍法进行测定。[结果]白背飞虱种群对噻虫嗪的敏感性最高,LC50值在0.40~1.68 mg/L之间;其次为吡虫啉和毒死蜱,LC50值范围分别为0.42~6.89 mg/L和2.35~4.62 mg/L;对吡蚜酮、敌敌畏、噻嗪酮和异丙威的敏感性相对较低。[结论]贵阳和遵义白背飞虱种群对吡虫啉的敏感性差异超过16倍,白背飞虱抗药性地区建议采用其他药剂进行防治。 [Objective] The research aimed to understand the sensitivity of white-backed planthopper populations to 7 common pesticides in 2012 in Guiyang, Zunyi, Pingtang, Pingba and Qianxi of Guizhou Province. [Method] Rice stem dipping method was used for determination. [Result] The results showed that the whiteflies were the most susceptible to thiamethoxam, with LC50 ranging from 0.40 to 1.68 mg / L, followed by imidacloprid and chlorpyrifos. The LC50 values ​​ranged from 0.42 to 6.89 mg / L and from 2.35 to 4.62 mg / L; the sensitivity to pymetrozine, dichlorvos, buprofezin and isoprocarb is relatively low. [Conclusion] The sensitivity of the population of white-backed planthoppers in Guiyang and Zunyi to imidacloprid was more than 16 times higher than that in other areas.