新疆的哈密瓜(Cucumis melo L.Var.inodrus N.)以瓜大肉甜独具风味,在国内外市场享有盛名,但近年因发生哈密瓜叶枯病,品质和产量急骤下降。这种叶枯病在过去少见,植株基部叶片先现症状,病斑中央白色,边缘隆起,随病情发展,病斑连成片,全叶迅速枯焦(图1);茎蔓和果实也被害,果实上病斑与叶部相似,果皮呈疮痂状,在果实运输和贮藏期间继续引起腐烂,造成损失极为严重。此病在新疆发病率逐年上升,今年北疆商品瓜基地损失惨重,重病田病情指数已达80以上,有 Xinjiang melon (Cucumis melo L. Var. Inodrus N.) melons big sweet and unique, renowned in domestic and foreign markets, but in recent years due to the occurrence of melon leaf blight, quality and yield declined sharply. This leaf blight is rare in the past, the first symptoms of plant leaves at the base, the central lesion white, edge uplift, with the progression of the disease, the film even into pieces, the whole leaf quickly Kujiao (Figure 1); stems and fruits were also killed, The lesion on the fruit is similar to the leaf, the scallop is scab-like and continues to cause decay during fruit transport and storage, resulting in extremely serious losses. The incidence of this disease in Xinjiang increased year by year this year, the northern base of heavy losses of commodity melons, sick disease index has reached more than 80, there