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近几年,黄瓜细菌性角斑病有所发展,其症状类似黄瓜霜霉病,但也有区别。 黄瓜细菌性角斑病和霜霉病病斑。开始都呈水渍状,而且由于受叶脉限制,均呈多角形。继续发展角斑病的病斑中央干枯脱落,形成穿孔,而霜霉病的病斑不穿孔;另外,角斑病在叶片、果实的病斑上,常常有乳白色细菌性粘液,而霜霉病叶子上无粘液,叶背上有灰黑色霉层。 保护地的发展是造成黄瓜细菌性角斑病发病严重的主要原因。因为保护地实行轮作困难,而病菌
In recent years, cucumber bacterial angular leaf disease has developed its symptoms similar to cucumber downy mildew, but there are also differences. Cucumber bacterial angular leaf spot and downy mildew spot. The beginning were all water-like, but also due to the limitations of the veins, were polygonal. Continue to develop the angular spot disease central spot dry off, forming perforation, and downy mildew spot is not perforated; In addition, angular leaf spot in the leaves, fruit spots, often with milky bacterial mucus, and downy mildew No mucus on the leaves, gray-black moldy leaves on the back. The development of protected areas is the main reason for the serious incidence of bacterial angular leaf spot in cucumber. Because the protection of the implementation of rotation difficulties, and germs