豇豆轮纹病又称灰斑病、棒孢叶斑病,是豇豆的一种常见病害,近年该病为害呈上升态势。多在开花结荚后发生,主要为害叶片,也为害茎和豆荚。一、发病症状叶片发病:初生红褐色小斑点,微突起,扩大后,病斑圆形或近圆形,直径4~8毫米,红褐色,边缘明显,斑面上有明显的同心轮纹,病部中心轮纹颜色稍 Cowpea ring disease, also known as gray spot disease, Corydalis leaf spot disease is a common disease of cowpea, the disease in recent years, the damage is on the rise. Occurred after flowering pod, mostly damage the leaves, but also harm stems and pods. First, the incidence of disease leaves the disease: primary reddish brown spots, microprojections, expanded, the lesion was round or nearly circular, 4 to 8 mm in diameter, reddish-brown, with obvious edges, plaques have obvious concentric pattern, Sick center color wheel slightly