怎样防治苹果银叶病答安徽读者李玉梅等苹果银叶病是一种真菌病害。这种病除危害苹果外，还侵害梨、桃、樱桃、杏、枣等果树。病菌经伤口侵入树体后，便在枝干内生长蔓延，并分泌一种毒素，随输导组织进入叶片。叶片受害，初期变黄，叶厚而脆，叶片正面出现退色斑点，病情... How to prevent and cure the silver leaf disease of apple Reply to Anhui Li Yumei apple silver leaf disease is a fungal disease. In addition to endangering the disease of this apple, but also against pear, peach, cherry, apricot, jujube and other fruit trees. Pathogens invade the tree by the wound, then grow and spread in the branches, and secrete a toxin, with the guide tissue into the leaves. Damaged leaves, the initial yellow, thick leaves and crisp, faded spots on the front of the leaves, the condition ...