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绵蚜是甘蔗主要害虫之一。它喜欢成群地集结在蔗叶背面中脉两旁,吸食叶汁,破坏叶部组织。同时它排泄的蜜露溅在蔗叶上面,导致甘蔗发生煤烟病,障碍叶片光合作用,被害的蔗株生长萎缩,产量降低,糖份减少,质量变坏,甚至不能煮成片糖。留作种苗萌芽率低,保留宿根发株差。绵蚜虫为害的甘蔗,一般减产5～8%,严重的达25～35%,个别甚至达60%。一、天敌的种类调查绵蚜虫的天敌种类多,数量大,据初步调
Cotton aphid is one of the main pests of sugarcane. It likes to gather in groups in the back of the cane on both sides of the midrib, smoking leaf juice, destruction of leaf tissue. At the same time, the excreted honeydew splashed on the cane leaves, resulting in the sooty disease of sugarcane, the photosynthesis of the obstructing leaves, the shrinkage of the cane damaged, the decrease of the yield, the decrease of the sugar, the deterioration of the quality, and even the failure to cook the sugar. Reserved for seed germination rate is low, to retain the perennial hair poor. Cotton aphid-damaged cane, the general reduction of 5 to 8%, a serious 25 to 35%, even up to 60%. First, the types of natural enemies of cotton aphids in the investigation of natural enemies and more, a large number, according to preliminary adjustment