黄瓜枯萎病又叫“蔓割病”,俗称死秧,是一种土壤传染,从根或根茎部侵入在维管束寄生的系统性病害。近几年来,乐亭县由于黄瓜栽培面积不断扩大,尤其是塑料大棚黄瓜的大面积发展,土壤菌量的积累逐年增多,此病的发生日趋严重,一般发病率在10％—20％,个别严重地块在50％以上,对黄瓜产量构成了一定影响。 黄瓜枯萎病属真菌性病害,在黄瓜幼苗期发病较少,但在多年重茬的老棚室中也有发生。幼苗出土后两片子叶表现不均匀的黄化,并萎蔫下垂,扭曲 Cucumber wilt disease, also known as “vine-cut disease”, commonly known as dead seedlings, is a soil infection, root or rhizomatous invasion of systemic vascular disease in the bundle. In recent years, Laoting County, cucumber cultivation area continues to expand, especially the plastic greenhouses cucumbers large-scale development, the accumulation of soil bacteria increased year by year, the incidence of the disease is more serious, the general incidence of 10% -20%, individual Serious land in more than 50% of the cucumber production has a certain impact. Fusarium wilt is a fungal disease, less incidence of cucumber seedling stage, but in many years old stubble shed also occurred. Seedlings unearthed two cotyledons showed uneven yellowing, and wilting sagging, distorted