秋菜花黑腐病,是蔬菜一种维管束病害,由野油菜黄单孢杆菌侵染所致。 症状 幼苗出土前发病不能出苗,出苗后发病,子叶成水渍状,真叶叶脉上出现小黑条,根髓部发黑,不久幼苗枯死。成株被害,多从叶缘和虫伤处开始发病,病部从两边向内扩展,形成“V”字型黄褐色病斑,叶脉坏死变黑后叶片枯 Autumn cauliflower black rot is a vascular disease of vegetables, caused by the infection of wild canola Xanthomonas. Symptoms Emergence of seedlings can not emerge before emergence, emergence of disease, cotyledons into water-like, true leaf veins appear small black strips, roots of the Ministry of black, shortly after the seedlings withered. Adult plant damage, and more from the leaf margin and insect pests began to attack the disease department inward from both sides of the expansion, the formation of “V” -shaped brown spots, veins necrosis of the leaves after dark necrosis