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1.病叶对光的透视度不同。角斑病病叶有透光感觉;霜霉病病叶无透光感觉。2.发病部位不同。角斑病主要侵染瓜条和叶片,有时危害瓜蔓;霜霉病主要危害叶片。3.病斑颜色和穿孔差异。角斑病病斑颜色较浅,呈灰白色,初期易开裂,形成穿孔;霜霉病病斑颜
1. diseased leaves on the light of different degrees of transparency. Leaf spot disease leaves have a light feeling; downy mildew disease leaves no light perception. 2 different parts of the disease. Corner spot disease mainly infects melons and leaves, sometimes harm melon vine; Downy mildew is the main hazard leaves. 3 spot color and perforation differences. Corner spot lesion color lighter, gray, easy to crack the initial formation of perforation; downy mildew spot