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一、症状:主要为害叶片,也侵染枝梢和果实。叶片受害,最初叶上产生水浸状小斑点,扩大后病斑呈园形或不规则形,褐色至紫褐色,直径2mm,病斑周围呈现水渍状,有黄绿色晕圈。以后病部干枯,病健交界处产生一圈裂纹,易脱落造成穿孔状,或部分与叶片相连。严重时一片叶上发生十几个至数十个病斑。常数个小斑汇合成一个大斑,易早期落叶。
First, the symptoms: the main damage leaves, but also infected shoots and fruits. Leaf damage, the first leaves of the flooding-like small spots, expanded lesions were circular or irregular shape, brown to purple brown, diameter 2mm, stains appear around the water-like, yellow-green halo. After the disease Department withered, disease-health junction has a circle of cracks, easy to fall off caused by perforation, or part of the leaves connected. Occurred in a serious leaf more than a dozen to dozens of lesions. Constant small spots merged into a large spot, easy to early deciduous.