试验对哈尔滨、北京、天津、兰州、南京、广州等地的黄瓜枯萎病菌，用Ｇ．Ｍ．Ａｒｍｓｔｒｏｎｇ的鉴别品种以及长春密刺、津研２号黄瓜采用胚根接种法进行了小种鉴定．其结果，ＭＳＵ４４１０３４、ＭＳＵ８５１９对所有７个供试菌株表现为抗病，而ＰＬ３９０２６５则表现为感病，根据鉴别品种反应，供试菌种与已发表的小种不同，初步认为是新小种．故暂定为小种４．供试的黄瓜枯萎病菌７个菌株，其致病性和致病力大体相同，均属于同一类小种。 Experiments on Harbin, Beijing, Tianjin, Lanzhou, Nanjing, Guangzhou and other places of cucumber Fusarium wilt, with G. M. Armstrong identification varieties and Changchun secret needles, Jin research on the 2nd cucumber radicle inoculation method was racial identification. As a result, MSU441034 and MSU8519 showed resistance to all seven tested strains, whereas PL390265 showed susceptibility to infection. According to the identification of the cultivars, the test strains were different from the published races and were initially considered as new races. It is tentatively scheduled for races 4. Seven strains of cucumber Fusarium oxysporum f. Sp. Were tested for their pathogenicity and virulence, which belong to the same race.