日光温室中栽培黄瓜,经常发生的细菌性病害有细菌性角斑病、细菌性缘枯病等。黄瓜细菌性角斑病主要为害叶片,也可为害叶柄、卷须、果实和茎蔓。苗期至成株期均可受害。子叶染病,初呈水浸状、近圆形的凹形病斑,后变黄褐色,真叶染病,初为鲜绿色水浸状病斑,逐渐变淡褐色、灰褐色或黄褐色。病斑因受叶脉限制呈多角形。湿度大时,叶背病斑上 Cultivation of cucumbers in the greenhouse, bacterial diseases often occur are bacterial angular leaf spot, bacterial edge blight and so on. Cucumber bacterial angular leaf disease is the main damage leaves, pests can also be harmful, tendril, fruit and stem vine. Seedling to adult stage can be affected. Cotyledonary disease, was initially flooded, nearly circular concave lesion, after the change of brown, true leaf disease, the initial is a bright green spot disease, gradually pale brown, taupe or yellow brown. Lesions due to the limitations of the veins polygonal. Humidity, leaf disease spots on the back