Isolation and evaluation of rhizobacteria against Ralstonia solanacearum the incitant of bacterial wilt of tomato

Abstract

Bacterial wilt caused by Ralstonia solanacearum is the world’s most economically important destructive disease of crop plants. In the current study, we aimed to evaluate the novel bacterial isolates from tomato rhizosphere for biocontrol of Ralstonia solanacearum. One eighty bacterial strains were isolated from the tomato rhizosperic soils collected from different regions of Uttarakhand state and evaluated for their biocontrol activity against R. solanacearum under in vitro conditions. Among them, six isolates were found to be highly effective in inhibiting the growth of R. solanacearum. The isolate GP2NA8 produced the highest inhibition zone followed by that of GP1NA2 and GP3NA6.