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角斑病是一种细菌侵入引起的病害,主要为害黄瓜(或丝瓜)的叶片、果实和茎蔓.叶片受害,初期在叶的背面呈水渍状斑点,正面淡褐色,病斑呈多角形,叶背没有霉状物,这与霜霉病有截然不同;后期病斑呈黄褐色而干枯,严重时扩展到整个叶片.在丝瓜上初期症状与黄瓜相同,但后期病斑呈黑褐色干枯.果实和茎上病斑初期呈水渍状,后呈淡灰色,近圆形,潮湿时,可见乳白色细菌菌脓,病斑向内扩展,沿维管束的果肉逐渐变色,并可蔓延到种子.老病斑干枯灰白色,中部常产生裂纹.染病轻微的瓜味淡,久煮不烂,不勘食
Corner spot disease is a disease caused by bacterial invasion, the main damage cucumber (or sponge gourd) leaves, fruits and stems and leaves. Victims of damage, the early leaves in the water-like spots on the back, pale brown, lesions were polygonal , There is no mildew on the leaves, which is quite different from the downy mildew; the late plaques were brown and dry, severe extended to the entire leaves in the early symptoms of sponge gourd and cucumber the same, but the late spot was dark brown dry Lesions of fruit and stems initially showed water stains, followed by pale gray, nearly circular, damp, milky white fungal pus was visible, the lesion expanded inwardly and the pulp along the vascular bundle gradually discolored and spread to the seeds Old spots dry ash gray, the middle often produce cracks. Slightly melon taste light, long cooking is not bad, not food