Proliferation of Ralstonia solanacearum marked with rifampicin on the tuber of ginger

Proliferation dynamics of rifampicin marked strain of Ralstonia solanacearum Zb01rif on the surface and within the tuber of gingers were investigated.The results showed that Zb01rifcould colonize on the ginger surface when the ginger was treated with Zb01rif 102cfu·ml-1for 6 h or 107cfu·ml-1for 0.5h and planted into the soil for 1h.The Zb01rif could be isolated within the tuber of ginger when the ginger was treated with Zb01rif at 10 cfu·ml-1 for 6h or 107 cfu·ml-1 for 0.5h and planted into soil for 48 h.The population of the Zb01rifon the surface of ginger was higher than that within the ginger.After the ginger was treated with Zb01rif and planted into soil, the population of Zb01 on the surface of ginger declined first, and then increased rapidly and declined slowly in the end.The population of Zb01rif within the ginger increased slowly within 15 days and it increased rapidly after 20 days.