二斑叶螨和朱砂叶螨对常用杀螨剂的敏感性比较

采用玻片浸渍法和叶片残毒法，选用哒螨灵等6种常用杀螨剂对二斑叶螨和朱砂叶螨进行了毒力测定。结果表明，6种供试药剂对二斑叶螨的卵和雌成螨的LC50均明显大于朱砂叶螨，说明二斑叶螨较朱砂叶螨对供试药剂有更强的耐药性。其中，两种害螨对噻螨酮的敏感性差异相对较小，而对喹螨醚、哒螨灵和阿维菌素等其它药剂的敏感性差异很大。

Comparing susceptibility of Tetranychus urticae and Tetranychus cinnabarinus to common miticides

Toxicity of pyridaben and five other miticides to Tetranychus urticae and T. cinnabarinus was determined using both slide-dip and leaf residue methods. LC50s of the six miticides for eggs and female adults of T. urticae were significantly higher than for T. cinnabarinus, indicating that T. urticae miticide tolerance is higher than that of T. cinnabarinus. The difference between the two spider mites in hexythiazox susceptibility was relatively small, while differences in fenazaquin, pyridaben, and abamectin susceptibility were large.