一、炭疽病主要危害瓜叶，叶边缘出现黑褐色病斑，病害严重时，整叶干枯。影响西瓜的光合作用，致使化瓜。防治方法：（1）起垄覆盖地膜栽培，垄宽60－80cm，高8－10cm，这样有利于排水，又防治热雨直接损害根部。（2）药剂防治，常用农药有70％甲基硫菌灵可湿性粉剂，80％炭疽 First, anthrax melon leaves the main damage, leaf edge dark brown spot, serious disease, the entire leaf dry. Affect the photosynthesis of watermelon, resulting in melon. Control methods: (1) Ridge covering plastic film cultivation, ridge width 60-80cm, high 8-10cm, it is conducive to drainage, and prevent direct damage to the roots of hot and humid. (2) Pharmacy control, commonly used pesticides are 70% thiophanate-methyl wettable powder, 80% anthrax