苹果垢斑病多因真菌侵染所致,使果面出现一层不规则片状黑灰,既象烟熏,又似锈垢,常被称为“烟霉病”或“水锈”.也有少数因刺吸式口器害虫的排泄液被霉菌寄生,形成蝇粪状或煤点状黑点群,果农们称为“煤点病”或“蝇粪病”.由于苹果垢斑病只为害果皮,不影响产量,因而往往被忽视.但是,果实感病后,因锈灰覆盖影响光照,果实着色不好,皮厚,含糖 Apple leaf spot disease mostly due to fungal infection, so that the surface layer of irregular flaky black ash, both as smoke, but also like rust, often called “smoke mold” or “rust.” There are also a small number of piercing sucking mouthparts pest excretion by mold parasitic, forming fly feces or coal dot black group, fruit farmers are called “coal point disease” or “fly fecal disease.” Because of apple leaf spot disease Damage to the peel, does not affect the yield, which is often overlooked.But, after the fruit is susceptible to disease, due to the impact of rust covered by light, the fruit coloring is not good, thick skin, sugar