枯萎病又称蔓割病、萎蔫病 ,是西瓜最主要的病害之一 ,自苗期至伸蔓、结瓜期都可发生 ,以结瓜期为最重 ,一旦发病 ,轻则减产 2 0 -50 %,重则绝收 ,严重影响生产。患病初期 ,在中午气温升高时 ,从下部叶片开始 ,似失水状萎蔫 ,傍晚逐渐恢复 ,次日中午又表现萎蔫 ,并逐渐向上部扩 Fusarium, also known as spore disease, wilt disease, is one of the most important diseases of watermelon, since the seedling to extend the vine, fruiting period can occur to fructose, the most important, once the disease, ranging from light to reduce 20 -50%, heavy is absolutely not received, seriously affecting the production. Early illness, noon temperature rise, starting from the lower leaves, like watery wilting, gradually restored in the evening, the next day at noon and showed wilting, and gradually upward expansion