通过田间调查和人工接种，首次发现苹果根爪绵蚜是为害苹果树根的重要新害虫，并确定苹果根爪绵蚜营异寄主全周期生活，其原生寄主为榆，次生寄主为苹果、沙果。５月中旬至５月底，苹果根爪绵蚜以有翅干雌成蚜迁飞到苹果园，在苹果树根梢产无翅孤雌侨蚜为害；１０月初至１１月初，又以有翅性母成蚜迁飞到榆树上产雌、雄性蚜，交配后雌蚜产卵，以卵越冬；春季干母、有翅干雌为害榆叶形成虫瘿。 Through the field investigation and artificial inoculation, it was first discovered that the apple rootworm, Myzus persicae is an important new pest that damages the apple tree root, and the full-cycle life of the apple-tree ghost aphid is identified. The primary host is elm, the secondary host is apple, Sand fruit. From mid-May to the end of May, apple aphid apples migrated to the apple orchard with winged dry-stem female as aphids, which were harmed by wingless parthenoideous aphid in apple tree shoots. From early October to early November, Mother into aphids migrate to the elm on female and male aphids, female spawning after mating to the eggs overwintering; spring dry mother, winged stems and herds of female elm formation leaves.