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我县棉田中棉花蚜虫主要有6种、即:棉蚜、棉黑蚜、棉长管蚜、拐枣蚜、桃蚜、菜豆根蚜。1棉蚜的危害特点1.1棉蚜以刺吸式口器刺入棉叶背面或嫩头,吸食汁液。1.2苗期受害,棉叶卷缩,开花结铃期推迟。1.3成株期受害,上部叶片卷缩,中部叶片现出油光,下部叶片枯黄脱落,叶表有蚜虫排泄的蜜露,易诱发霉菌的滋生,蕾铃受害,易脱落,影响棉株发育。棉蚜造成棉花损失率在
There are 6 kinds of cotton aphids in cotton field in our county, namely cotton aphid, cotton aphid, cotton aphid, Chinese cabbage aphid, peach aphid and bean aphid. 1 cotton aphid harm characteristics 1.1 cotton aphid Piercing suction mouth piercing cotton leaf on the back or tender, sucking juice. 1.2 seedling victims, cotton curling, delayed flowering bolls. 1.3 adult plant damage, the upper leaves curled, the middle leaves shine, the lower part of the leaves withered off, leaf table with honeydew excreted by aphids, easy to induce mold breeding, bud damage, easy to fall, affecting cotton plant development. Cotton aphid causes loss of cotton at