近几年,随着保护地的发展,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的病斑,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易干枯脱落,形成穿孔,而霜霉病的病斑不穿孔;另外,角斑病在叶片及果实的 In recent years, with the development of protected areas, bacterial angular leaf disease has developed, the symptoms are similar to cucumber downy mildew, but there are also differences. Cucumber bacterial angular leaf spot and downy mildew disease spots, began to show water-like, but also due to the limitations of the veins, were polygonal. Continued development of angular leaf spot lesion easily dried off, forming perforation, and downy mildew spot does not perforated; In addition, angular leaf spot in the leaves and fruits