Influence of PGPR on Root Rot Pathogen Sclerotium Rolfsii L. of Groundnut In Vitro

The experiment was conducted in laboratory condition at department of plant pathology, BCKV, Mohanpur during 2008-10. Antagonists namely Bacillus spp., Azotobacter spp. and two strains of Rhizobium (Gn-1 and Mb-1) have been applied to control the root rot of groundnut. In in vitro studies Bacillus spp., Azotobacter spp. and two isolates of Rhizobium have been applied. For duel culture technique 2 sets were prepared. In the 1 st set pathogen and antagonist inoculated on the same day and in the II nd set pathogen inoculated 24 hours after the inoculation of antagonists. In both the sets Bacillus spp. showed maximum inhibition. In the 1 st set 54.25, 47.69 and 42.68% at 3, 4 and 5 DAI and in the II set 55.03, 52.52 and 47.73% at 3, 4 and 5 DAI respectively. Other antagonists also showed inhibition of Sclerotium rolfsii significantly over control.