苹果树银叶病是一种真菌病害。树体感病后,叶片正面呈死灰色并略带银白色光泽;入秋后,叶片上产生不规则褐色锈斑,叶表部分破裂,叶肉裸露而由绿变褐。受害枝条表皮呈油纸状。苹果树受害后,树势衰弱,果实变小,产量降低,严重的2～3年可全株枯死。 银叶病菌是一种弱寄生菌,土壤粘重、低洼积水、树 Apple Tree Silver leaf disease is a fungal disease. After the tree is infected with disease, the leaves appear dead gray and slightly silvery luster on the obverse; after the fall, irregular brown rust appears on the leaves, the leaf surface is partly broken, the leaf is exposed and the green is browned. Damaged branches epidermis was oily paper. Apple tree victims, the tree weakness, the fruit becomes smaller, lower yields, severe 2 to 3 years can die whole plant. Staphylococcus aureus is a weak parasitic soil, sticky soil, low water, trees