厚皮甜瓜枯萎病是大棚栽培生产上最重要的病害之一，从幼苗到生长后期均可发病，尤其在重茬的大棚中，经常呈点片发生，危害极为严重，一般减产３０％～５０％，甚至绝产，现将其发生及防治方法简介如下。 一、发病症状 苗期发病，叶色变浅，逐渐萎蔫，严重时幼苗僵化枯死。成 Fusarium wilt is one of the most important diseases in greenhouse cultivation. It can develop from seedling to the late growth stage, especially in the continuous cropping greenhouses, it is often spotted, the harm is extremely serious, and the yield is reduced by 30% ~ 50% , Or even abortion, now its occurrence and prevention methods are as follows. First, the incidence of symptoms at the onset of seedling, leaf color becomes shallow, gradually wilting, severe seedling rigid dead. to make