【目的】 为明确不同杀螨剂对朱砂叶螨Tetranychus cinnabarinus不同发育阶段的生物活性。   【方法】 采用浸渍法分别测定了10种杀螨剂对朱砂叶螨成螨、卵和若螨的毒力。【结果】 丁氟螨酯、阿维菌素和联苯肼酯对成螨、卵和若螨的活性均较高；乙螨唑和螺螨酯对卵和若螨活性较高，但对成螨活性明显偏低；甲氰菊酯对成螨和若螨的活性优于卵；唑螨酯、哒螨灵和三唑锡对3种螨态也均具有毒杀作用，但毒力偏低。同一种杀螨剂对若螨的活性均高于成螨和卵，乙螨唑、螺螨酯、联苯肼酯、唑螨酯和炔螨特对卵的活性高于成螨，丁氟螨酯、阿维菌素、甲氰菊酯、哒螨灵和三唑锡对成螨的活性高于卵。【结论】 不同杀螨剂对朱砂叶螨不同发育阶段毒力存在较大差异，田间用药防治时应根据害螨发生情况和发生阶段，选择适合的防治药剂。

[Objectives]  To determine the activity of ten acaricides to different development stages of Tetranychus cinnabarinus. [Methods]  Toxicities of these acaricides against adults, eggs and nymphs of T. cinnabarinus were investigated using dipping method. [Results]  Results showed that cyflumetofen, abamectin and bifenazate displayed high activity to all three stages of T. cinnabarinus. Etoxazole and spirodiclofen showed high toxicity to eggs and nymphs of T. cinnabarinus, but low activity to adults. Fenpropathrin exhibited higher activity to adults or nymphs than to eggs of T. cinnabarinus. Fenpyroximate, pyridaben and azocyclotin all had low activity to different development stages of T. cinnabarinus. All acaricides showed higher toxicity to nymphs than to adults or eggs. Etoxazole, spirodiclofen, bifenazate, fenpyroximate and propargite showed higher activity to eggs than to adults of T. cinnabarinus, but cyflumetofen, abamectin, fenpropathrin, pyridaben and azocyclotin had opposite results. [Conclusion]  These results indicated that the toxicities of ten acaricides had different activities to development stages of T. cinnabarinus, and the suitable acaricides should be selected according to the occurrence of T. cinnabarinus.