一、分布与危害 棉叶螨俗称红蜘蛛,是世界性害螨,我国各产棉区都有分布。 叶螨常聚集在棉叶背面,用口针刺吸叶片细胞汁液。受害叶片最初出现黄白斑点,后变红色,一般叶背为黄红色,叶螨多时,常有细丝网粘有尘土,叶面显出红斑,严重时全叶变成褐色,像火烧一样。受害叶片干枯 First, the distribution and damage Cotton spider mite, commonly known as red spider, is a worldwide pest mites, cotton production areas in our country are distributed. Spider mites often gather in the back of the cotton leaf, with mouth acupuncture suction leaf cell juice. Damaged leaves initially appear yellow and white spots, after turning red, the general leaf back yellowish red, spider mites often, the fine mesh sticky dust, leaf surface erythema, severe whole leaf becomes brown, like a fire. Damaged leaves dry