不同西瓜品种对西瓜枯萎病菌(Fusa- rium oxysporium　f.sp.niveum)的抗性 有差异,不同的病菌分离物对西瓜品种的致 病性也有差异。但是,品种与病原菌之间是否 存在交互作用,如何评价品种的抗病性等问题尚不清楚。近两年来,我们对来自陕西、河北、湖南、江苏等4个省的菌株在不 The resistance of different watermelon cultivars to Fusarium rium oxysporium f.sp.niveum was different, and the pathogenicity of different germ isolates to watermelon cultivars was also different. However, whether there is interaction between varieties and pathogenic bacteria and how to evaluate the disease resistance of the varieties is not yet clear. In the past two years, we did not test the strains from 4 provinces including Shaanxi, Hebei, Hunan and Jiangsu