苹果腐烂病在各地幼龄、成龄苹果园均有程度不同的发生,是主要的苹果枝干病害。一、症状 1.渍疡型病斑红褐色、水渍状、略隆起,病部皮层组织松软,手指压凹陷,易流出红褐色粘液,病皮易撕裂,有酒糟味;后期病变组织逐渐干缩下陷,呈黑褐色并生有许多小黑点,易产生菌丝进行传播。当病斑扩展到环绕枝干一周后,大枝甚至整株即能枯死。 Apple rot disease around the young, aged apple orchard have different degrees of occurrence, is the main apple branch disease. First, the symptoms 1. ulcer-type lesions reddish brown, water-like, slightly elevated, diseased cortical tissue soft, finger depression, easy to flow reddish brown mucus, the skin is easy to tear, wine bad smell; later lesion gradually Dry shrinkage subsidence, was dark brown and has many small black spots, easy to produce mycelium for dissemination. When the lesion extended to surround the trunk a week later, even the whole branch can die.