蚕豆赤斑病俗称豆瘟、红点病。主要危害蚕豆的叶和茎,也危害嫩荚。发生初期叶上产生赤色小点,逐渐扩大成圆形或椭圆形赤色病斑,以后中央赤褐色稍凹陷,边缘浓褐色,稍隆起。茎和叶柄上的病斑扩大后成条状赤斑,最后表皮破裂产生长短不等的裂缝。潮湿 Broad bean brown spot known as soybean blast, red dot disease. The main hazards of broad bean leaves and stems, but also endanger the tender pods. Occurred at the beginning of the leaves have red dots, and gradually expanded into round or oval-shaped red spots, after the central auburn slightly depressed, dark brown edge, slightly uplift. Stems and petioles on the spot after the expansion into a strip of red spots, the final breakdown of the skin to produce cracks of varying lengths. Wet