枯萎病是西瓜栽培中最重要的病害之一,从幼苗期至结果期均可发生,尤以重茬地发病更为严重,一般减产20%～50%,重者绝收。为了解决这一难题,近年来大面积推广了西瓜嫁接栽培技术,取得了较好的防治效果。但在生产中仍有部分嫁接后的西瓜植株发生枯萎病为害,发病率达10%以上。通过 Fusarium wilt is one of the most important diseases in watermelon cultivation. It can occur from the seedling stage to the fruiting stage, especially in stubble field. Generally, the yield is reduced by 20% ~ 50%. In order to solve this problem, in recent years, large-scale popularization of watermelon grafting cultivation techniques, and achieved good control effect. However, in the production of watermelon plants after grafting still some of the wilt disease, the incidence rate of 10% or more. by