The susceptibility of adults of Bemisia tabaci and Trialeurodes vaporariorum to 3 insecticides, imidaclo-prid, beta cypermethrin and dimethyl - dichloro - vinyl - phosphate was studied with the method of leaf - dip bio-assay. Results suggested that the susceptibility of B. tabaci and T. vaporariorum, collected from same areas in Shandong to 3 insecticides, had been approximately same. High variability in the susceptibility to dimethyl - dichloro - vinyl - phosphate, beta cypermethrin and imidacloprid was noted, ranging from low ( LC50 = 1383 -1965mg/L) to medium ( LC50 = 124 - 153mg/L) to high lethal concentration 50 ( LC50 = 60 - 95mg/L). But T. vaporariorum (Qingdao) to imidacloprid had generated the medium level resistance. So we should streng their resistance monitoring.%2007～2008年通过琼脂浸叶法测定山东不同地区烟粉虱和温室白粉虱对吡虫啉、高效氯氰菊酯和敌敌畏3种杀虫剂的敏感性.同一地区内,烟粉虱和温室白粉虱对3种杀虫剂敏感度基本相同.温室白粉虱和烟粉虱成虫对吡虫啉的敏感度高,LC50为60 ～ 95mg/L；其次是高效氯氰菊酯,LC50为124～ 153mg/L;最低为敌敌畏,LC50为1383～1965mg/L.但是青岛温室白粉虱种群对吡虫啉抗性程度已达中等水平,应加强其抗药性监测.
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