苹果斑点落叶病是由Alternaria mali Roberts病菌引起的一大病害。可引起早期落叶,使树势衰弱。该病菌侵染果面,造成斑点,影响果品质量。苹果斑点落叶病为气流传播,具有多次再侵染特性,生长期需多次喷药防治。鉴于波尔多波、多菌灵等对此病基本无效,我 Apple spotted leaf disease is a major disease caused by Alternaria mali Roberts. Can cause early deciduous, making the tree weak. The bacteria infect the fruit surface, causing spots, affecting fruit quality. Apple spot defoliation is air-borne, with multiple re-infecting characteristics, multiple sprays need to be controlled during the growth phase. In view of Bordeaux waves, carbendazim basically ineffective on this disease, I