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二斑叶螨是我国北方落叶果树上新发现的一种危险性害螨,近几年在我省的昌黎、石家庄郊区等一些果园发生为害,并呈扩散蔓延之势。由于其寄生复杂,繁殖力强,且对多数常用杀螨剂有较强的抗药能力,防治比较困难,在个别果园已上升为优势种群,应引起重视。二斑叶螨的雌成螨呈椭圆形,长约0.5～0.6毫米,宽0.3～0.4毫米,体色呈灰绿、黄绿或深绿色。体背两侧各有1个明显褐斑,褐斑外侧呈3裂。越冬滞育型雌成螨体色变
Two-spotted spider mite is a newly discovered dangerous pest on northern China’s deciduous fruit trees. In recent years, some orchards in Changli and Shijiazhuang suburb of our province have been harmed and spread. Due to its parasitic complexity, strong fertility, and the majority of commonly used acaricides have strong drug resistance, prevention and control more difficult, in individual orchards has risen to the dominant population should be taken seriously. Two-spotted spider mite female adult mites were oval, about 0.5 to 0.6 mm, width 0.3 to 0.4 mm, body color was gray-green, yellow-green or dark green. Body on both sides of each have a significant brown spot, brown spot lateral 3 crack. Overwintering diapause adult female mite body color change