从油橄榄青枯病菌保存的菌种配制的细菌悬浮液,接种在含有氯化三苯基四氮唑培养基时,发现菌落形态有白色、白色中间带淡红色和深红色等不同类型。经过生理生化测定所得结果不同菌落形态的反应是一致的,但其致病力有显著的差异:白色或白色中间带淡红色的菌落致病力高,深红色菌落致病力弱或不致病。 The bacterial suspension prepared from the strain preserved by R. solanacearum was inoculated into a medium containing triphenyltetrazolium chloride and found that the colony morphology was white and that the middle of the white band was of a different type such as light red and dark red. After physiological and biochemical determination of the results obtained by different colony morphology is consistent, but there are significant differences in pathogenicity: white or white middle reddish colony high pathogenicity, dark red colonies weak or non-pathogenic .