温室黄瓜病害发生普遍,病害种类繁多,几乎瓜类中主要病害,如枯萎病、疫病、霜霉病、炭疽病、白粉病、细菌性角斑病等都有发生,尤以前四种病害最为严重,极大地影响产量。一、几种主要病害的症状 1.黄瓜霜霉病在适宜的条件下,此病发展迅速,一两周内可使整株叶枯死,直 Greenhouse cucumber diseases occur generally, a wide range of diseases, almost melon in the main diseases, such as blight, blight, downy mildew, anthracnose, powdery mildew, bacterial angular leaf disease have occurred, especially in the first four most serious diseases , Greatly affect the yield. First, the symptoms of several major diseases 1. Cucumber downy mildew Under appropriate conditions, the disease developed rapidly, within a week or two can make the whole plant dead leaves, straight