Abstract
After using Ralstonia solanacearum to inoculate roots of S. toxicarium rootstocks (resistant to bacterial wilt and some diseases caused by fungi and nematodes) which had tomato scions, the bacteria were detected at 2 and 4 days after root inoculation in one of three aboveground stems of the rootstock. The bacteria were detected 2 to 3cm from the inoculation site 90 days after needle-puncture inoculation of the (rooststock) stem. Neither the rootstock nor the scion wilted. Both S. toxicarium and grafted plants were resistant to bacterial wilt. R. solanacearum can move within root and stem tissue of S. toxicarium, but could not move from rootstock stem (S. toxicarium) into scion (tomato) of grafted plant.
