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苹果瘤蚜是为害苹果的主要害虫之一，元帅、青香蕉、鸡冠等品种受害较重，以成虫和若虫群集在新芽、嫩叶或幼果上吸取汁液，使叶片纵卷，变为黑褐色而干枯死亡。幼果被害后出现许多凹陷而不整齐的紫红色斑点。严重时，全树叶片卷缩干枯，使果树生长发育不良，甚至整树枯死。对
Apple aphids is one of the major pests that harm apple. Marshal, green banana and cockscomb are heavier victims. Juveniles and nymphs are clustered in the sprouts, young leaves or young fruits to draw juice, so the leaves are rolled and turned into dark brown Death and death. After the young fruit was killed many concave and irregular purple spots. Seriously, the whole tree leaves curl dry, poor growth and development of fruit trees, and even the entire tree dead. Correct