荸荠是江苏省溧水县重要的经济作物,常年种植面积在500亩以上。近期部分田块的荸荠发生秆枯病,出现茎叶发黄、枯死等症状,不仅造成减产,而且品质也受到较大影响。荸荠秆枯病主要危害荸荠叶鞘和茎秆。叶鞘染病,基部先出现暗绿色不规则水渍状病斑,后扩展到整个叶鞘,病部 Water chestnuts is an important economic crop in Lishui County, Jiangsu Province. The perennial planting area is above 500 mu. Recently some fields of water chestnut tuberose blight, there stems yellow, dead and other symptoms, not only resulted in reduced production, but also greatly affected the quality. Water chestnut stem blight the main hazards of water chestnut leaf sheath and stem. Leaf sheath disease, the first base of the dark green irregular water stain-like lesions, extended to the entire leaf sheath, disease Department