瓜类枯萎病可视为瓜类的癌症病害，病菌从根部伤口或根尖侵入，在根茎的维管束内生长发育，堵塞维管束，阻止水分和无机盐运输，还分泌毒素而引起植株萎蔫。进入 90年代以来，该病的发生逐年加重，发病率一般在 20％～ 30％，严重地块达 50％左右，甚至绝产。种子、土壤和肥料 Fusarium wilt can be regarded as a kind of cancer diseases of melons. Pathogenic bacteria invade from root wound or apical root, grow and develop in the vascular bundles of rhizomes, block vascular bundles, prevent the transport of water and inorganic salts, and also cause the secretion of toxins and cause plant wilting. Since entering the 90’s, the incidence of the disease has increased year by year, the incidence rate is generally 20% to 30%, a serious block of about 50% or even abortion. Seeds, soil and fertilizers