In vitro biocontrol activity of rhizosphere isolates against wilt causing pathogen of Redgram (Cajanus cajan)

An experiment was conducted in the Department of Agricultural Microbiology, GKVK, UAS, Bengaluru, to screen the bacterial isolates from rhizosphere soil of Redgram against the wilt causing pathogen of Redgram under in vitro condition. Forty bacterial isolates were tested in vitro condition for their biocontrol activity against fungal plant pathogen using Dual plate technique and mycelial dry weight reduction assay. The study revealed that bacterial isolates from Redgram rhizosphere found to inhibit the growth of wilt causing Fusarium spp. in the laboratory conditions. The isolates RGB8 (63.33% inhibition in dual plate and 70% inhibition of dry mycelial weight) and RGP7 (60.00% inhibition in dual plate and 65.78% inhibition of dry mycelial weight) found to be effective against the Fusarium wilt pathogen which can be used as bio inoculant against the wilt pathogen.