苹果早期落叶病是我省苹果的主要病害,苹果树往往在七、八月份就因早期落叶病落去了绝大部分叶片,大大削弱树势,降低苹果产量和品质,减少社员收入,影响市场供应和外销出口。早期落叶病包括褐斑病、灰斑病、圆斑病等等。病菌在落叶上越冬(是否还在其他地方越冬目前不清楚)。第二年浸染新叶,四、五月份开始在苹果树新叶上出现病斑,以后逐渐发展,如不加以控制,七、八月份病情十分严重,雨水多的年份危害更大。树 Apple early deciduous disease is the main disease in our province apples, apple trees are often due to early autumn deciduous disease in July and August fell most of the leaves, greatly weaken the tree vigor, reduce apple production and quality, reduce members income, affect the market Supply and export export. Early deciduous diseases include brown spot, gray spot, spot blotch and so on. Pathogen overwintering on fallen leaves (whether overwintering elsewhere is unclear). In the second year, the new leaf was digested. In April and May, the disease began to appear on the new leaf of the apple tree. Afterwards, the disease developed gradually. If not controlled, the condition was very serious in July and August, and the year with more rain was more harmful. tree