1.莲藕褐斑病 凡有莲藕的地方该病均有不;同程度的发生,是莲叶常见的一种病害。叶上产生淡褐色病斑,引起病叶局部干枯。防治应从田间种植管理入手,适当密植,确保藕田通风透光;适当增施磷钾肥,提高植株抗性,及时彻底清除病株残体。发病初期及时喷药,常用25％多菌灵600倍液,50％甲基硫菌灵800倍液,60％杀毒矾M_8 800倍液,75％百菌清1000倍液喷雾防治。 2.莲藕黑斑病 又称褐纹病。各地均有发生,仅发生在莲藕叶片上,严重时病斑汇合,叶片枯 1. Lotus brown spots Where the lotus root where the disease is not; the same degree of occurrence, is a common disease of lotus leaf. Hazel leaves produce lesions, causing diseased leaves partially dry. Prevention and treatment should start from the field planting and management, appropriate close planting, to ensure the lotus field ventilation and transparency; appropriate application of phosphorus and potassium fertilizer to improve plant resistance, timely and thorough removal of diseased plant residues. Early onset of timely spraying, commonly used 25% Carbendazim 600 times, 50% thiophanate-methyl 800 times, 60% anti-virus alum M_8 800 times, 75% chlorothalonil 1000 times spray control. 2. Lotus black spot disease, also known as brown spots. Occurred all over the place, only occurs on the lotus leaf, when the disease is serious, the leaves merge