根据病菌对海岛棉、陆地棉、中棉三大棉种的十五个鉴别品种之致病力测定和室内病菌培养性状的观察,上海的21个菌系对海岛棉和陆地棉感病品种均能强烈致病;对陆地棉抗病品种有不同程度的致病;对中棉由不致病到次强致病。按其致病与否和致病力的强弱,可将上海棉花枯萎病菌区分为两个生理型。 According to pathogenicity test of fifteen differentiated cultivars of three kinds of cottonseed, cottonseed and cottonseed, and observation on the traits of indoor germfree cultivation, the 21 bacterial strains of Shanghai Can have a strong pathogenicity; resistant to upland cotton varieties have varying degrees of pathogenicity; cotton from non-pathogenic to sub-strong pathogenic. According to their pathogenicity or virulence and virulence, the Shanghai Fusarium wilt can be divided into two physiological types.