大豆烂荚是大豆生产中最常见而且发生最严重的问题,也是影响大豆产量和产品品质的主要原因。大豆烂荚主要是由以下病害引起的。一、炭疽病引起烂荚大豆炭疽病主要为害茎和豆荚,也为害叶片。茎部染病初生褐色病斑,其上密布排列不规则的黑色小点。豆荚染病小黑点呈轮纹状排列,病荚不能正常发育。种子发霉、暗褐色并皱缩,或不能结实。叶片染病,病斑不规则形,边缘深褐色,内部浅褐色,病斑上生粗糙刺毛状黑点。 Soybean pod is the most common and most serious problem in soybean production, which is also the main reason that affects soybean yield and product quality. Rotten pods are mainly caused by the following diseases. First, anthracnose caused by rotten pods Soybean anthracnose main damage stems and pods, but also damage leaves. Stems infected with brown spot disease, arranged irregularly arranged on the black dots. Pods black spots dotted round arrangement, disease pod can not be normal development. The seeds are moldy, dark brown and shriveled, or not strong. Leaf blade disease, irregular spot-shaped lesions, the edge of dark brown, internal light brown, spotted on the rough hairy black spots.