树干涂药环防治苹果瘤蚜苹果瘤蚜属同翅目蚜虫科，主要危害苹果叶片、新梢及幼果，以元帅系苹果受害最重。初期被害嫩叶不能正常展开，后期被害叶皱缩，叶边缘向背面纵卷，个别叶片变为黑褐色，干枯死亡。受害严重的树，叶片全部卷缩，致使新梢生长和花芽形成受抑制，造成... Trunk coating ring control apple aphid apple tumor aphids is Homoptera aphididae, the main hazard to apple leaves, shoots and young fruit, the martyr-headed apple most affected. The initial damage to the young leaves can not be normal, the late victim leaves shrinkage, leaf edge to the back of the vertical roll, individual leaves into a dark brown, dry death. Damaged trees, leaves all curled, resulting in the growth of new shoots and flower buds inhibited, resulting in ...