Pathogenicity evaluation of the six <i>Fo</i> isolates that were PCR positive using the primers FIGS11 and NPIGS-R.

a<p>The symbol “+” means that these isolates could PCR amplify a 500-bp product with the primers FIGS11 and NPIGS-R; all of these products were sequenced and confirmed to have 100% identity with Fo276.</p>b<p><i>F. oxysporum</i> isolates were tested for their pathogenicity using the root dip assay on cucumber, and the symbol “−” means that there were no symptoms on the cucumber plant 3 weeks after inoculation.