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【目的】评价联苯肼酯对智利小植绥螨Phytoseiulus persimilis的安全性，以及该药剂与捕食性天敌智利小植绥螨联合使用的效果。【方法】采用室内生物测定与田间试验的方法测定了联苯肼酯对智利小植绥螨成螨和若螨致死率与繁殖能力的影响，以及二者联合使用对茄子上二斑叶螨的控制效果。【结果】结果表明143 mg/L联苯肼酯对智利小植绥螨成螨和若螨的存活和生殖能力均无显著影响，处理后96 h对若螨的最高致死率为2.30%，成螨为2.04%；处理组8 d的平均产卵量为15.08粒/雌，与对照平均产卵量15.45粒/雌无显著差异；处理组所产卵的平均孵化率为98.63%，与对照组平均孵化率98.13%无显著差异；联苯肼酯悬浮剂在143 mg/L浓度下对二斑叶螨的控制效果表现为速效性高于单独使用智利小植绥螨，但持效性低于智利小植绥螨，防效在第22天时开始下降。二者联合使用表现出较好的速效性与持效性，处理后第2天防效达97.35%，第18天时达100%。【结论】联苯肼酯对智利小植绥螨具有极高的安全性，该药剂与智利小植绥螨联合使用对二斑叶螨具有良好的控制效果。“,”Objectives] To assess the toxicity of the acaricide bifenazate on the predatory mitePhytoseiulus persimilis (Acari: Phytoseiidae), and evaluate the feasibility of using this acaricide in conjunction withP. persimilisto control the two-spotted spider miteTetranychus urticae (Acari: Tetranychidae). [Methods]The effect of bifenazate on the fecundity and mortality of adults and nymphs ofP. persimilis,and the efficacy of a combination of P. persimilisand bifenazate in controlling T. urticae were tested in the laboratory.[Results]At a concentration of 143 mg/L, bifenazate had no effect on the mortality and fecundity ofP. persimilis. Adult and nymph mortality were 2.30% and 2.04% respectively after 96 h. The treatment group had an average fecundity of 15.08 eggs per female, which was not significantly different to that of the control group (15.45 eggs per female). The average hatchability of the treatment group was 98.63%, which was also not significantly different to that of the control group (98.13%). A combination of bifenazate andP. persimilis resulted in fast and persistent control ofT. urticae, with a control efficacy of 97.35% after 2 d and 100% after 18 d. [Conclusion]Bifenazate does not affectP.persimilis but is effective againstT. urticae.The combined use of bifenazate andP. persimilis is effective in controllingT. urticae.