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苹果早期落叶病主要包括褐斑病,轮斑病、灰斑病、园斑病等几种病害。其中,以褐斑病发生较普遍,而严重。轮斑病、灰斑病、园斑病次之。近几年在西昌,凉山等地,黑腐病亦引起落叶。苹果早期落叶是近年生产上突出的问题。如早熟苹果区的蓬溪、南川等地,少数果园5月中旬即有落叶现象。一般果园7、8月间落叶达盛期。重病果园采果毕,叶落净,翻秋现象普遍。不但影响苹果花芽形成的数量和质量,果实品质和产量,而且显著的削弱了树势。所以被列为我省苹果生产上重要病害之一。
Early deciduous apple diseases include brown spot disease, leaf spot disease, gray spot disease, patch disease and other diseases. Among them, the occurrence of brown spot disease is more common, but serious. Leaf spot disease, gray spot disease, garden spot second. In recent years in Xichang, Liangshan and other places, black rot also caused deciduous. Early apple leaves are prominent problems in production in recent years. Such as premature apple area Pengxi, Nanchuan and other places, a few orchards in mid-May that there are deciduous phenomenon. General orchard in July and August deciduous up to date. Ill end of the orchard picking fruit, leaves off the net, fall autumn phenomenon common. Not only affect the quantity and quality of apple flower bud formation, fruit quality and yield, but also significantly weaken the tree vigor. So it is listed as one of the important diseases in our province’s apple production.