| Summary: | <i>Rhodococcus fascians</i> is an important pathogen that infects various herbaceous perennials and reduces their economic value. In this study, we examined <i>R. fascians</i> isolates carrying a virulence gene from symptomatic lily plants grown in South Korea. Phylogenetic analysis using the nucleotide sequences of 16S rRNA, <i>vicA</i>, and <i>fasD</i> led to the classification of the isolates into four different strains of <i>R. fascians</i>. Inoculation of <i>Nicotiana benthamiana</i> with these isolates slowed root growth and resulted in symptoms of leafy gall. These findings elucidate the diversification of domestic pathogenic <i>R. fascians</i> and may lead to an accurate causal diagnosis to help reduce economic losses in the bulb market.
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