萝卜黑腐病俗称黑心、烂心 ,是萝卜常见病害 ,此病还危害白菜类、生菜类等多种十字花科蔬菜。发病症状　叶片发病 ,叶缘多处产生黄色斑 ,后变“V”字形向内发展 ,叶脉变黑呈网纹状 ,逐渐整叶变黄干枯。病菌沿叶脉和维管束向短缩茎和根部发展 ,最后使全株叶片变黄枯死。萝卜肉质 Radish black rot commonly known as black heart, rotten heart, is a common disease radish, the disease also endangered cabbage, lettuce and other cruciferous vegetables. Morphology of the incidence of leaf disease, leaf margin occurred in many parts of the yellow spot, after the change “V” shape inward development, veins dark brown reticulate-like, and gradually whole leaves turn yellow dry. Pathogen along the veins and vascular bundles to the shortened stem and root development, and finally make the whole plant leaves yellow dead. Radish succulent