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棉花红蜘蛛,又叫棉叶螨,是我国各棉区普遍发生危害较重的一类害虫。棉花红蜘蛛主要在棉叶的背面吸食营养汁液,为害初时叶片正面出现较多白点,几天后叶柄处变红,重则落叶垮秆,状如火烧,造成大面积减产或绝收。发生规律棉花红蜘蛛5天平均气温在22~27℃时最有利其繁殖。当棉田处于低湿环境,相对湿度在35%~55%时最易发生。
Cotton spider mite, also known as cotton spider mite, is a common pest in the cotton area in our country. Cotton spider mainly in the back of cotton leaf to absorb nutrient juice, the beginning of the damage leaves appear more white spots, a few days later the petiole Department of red, heavy leaves fall straw, like burning, resulting in large-scale production or income. Occurred regular cotton spider mite average temperature of 5 days at 22 ~ 27 ℃, the most favorable breeding. When the cotton field in a low humidity environment, the relative humidity of 35% to 55% most likely to occur.