莲藕褐斑病是莲藕常见的一种叶部病害,在叶片上产生淡褐色病斑,使病叶局部干枯。防治方法:合理密植,确保藕田通风透光;适当增施磷、钾肥,提高植株抗病性;及时清除病株残体,防止病害传播蔓延;发病初期,及时用25%多菌灵600倍液或75%百菌清1000倍液喷雾。莲藕黑斑病又叫褐纹病,仅发生在叶片上,严重时 Lotus leaf spot is a common leaf lotus root disease, leaves in the light brown spot, the diseased leaves partially dry. Prevention and treatment methods: reasonable close planting, to ensure the lotus field ventilation and light; appropriate increase of phosphorus and potash, improve plant disease resistance; timely removal of diseased plants to prevent the spread of disease spread; early onset, timely use of carbendazim 600 times Liquid or 75% chlorothalonil 1000 times spray. Callus black spot disease, also known as brown, occurs only on the leaves, when severe