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1、症状 主要危害茎蔓和叶片。叶片上病斑近圆形或不规则形，有的自叶缘向内呈 V字形病斑，边界不明显，淡褐色至黄褐色，后期病斑易破碎。病斑轮纹不明显，上生许多黑色小点 (即病菌的分生孢子器 )。叶片上病斑直径 10～ 35mm；大病斑周围组织易发黄，有的甚至整个叶片
1, the main symptoms of harmful stems and leaves and leaves. Leaf lesions on the nearly round or irregular shape, and some inward V-shaped lesions from the leaf edge, the border is not obvious, light brown to yellow-brown, late lesions easily broken. Lesions pattern is not obvious, born many black dots (ie germ conidia). Leaf lesion diameter of 10 ~ 35mm; large lesions around the organization prone to yellow, and some even the entire leaves