西瓜苗期病害主要有猝倒病、炭疽病和疫病三种真菌病害，尤其在特早熟栽培的育苗过程中，若不能及时正确地识别与防治，会造成重大经济损失。１猝倒病出苗前发病表现为烂种、烂芽。出苗后感病，在地表的茎基部或中部发病，呈水渍状病斑，渐变黄褐色并缢缩凹陷，子叶或真... Watermelon seedling diseases are mainly damping off disease, anthracnose and disease three fungal diseases, especially in the precocious cultivation of nursery process, if not timely and correctly identify and control, will cause significant economic losses. 1  damping off disease emergence of disease before emergence as rotten, rotten buds. Emergence after the disease, in the surface of the stem base or the middle of the disease, was water-like lesions, gradient tan and shrink depression, cotyledons or true ...