In a green house evaluation, amongst the strains of Pseudomonas fluorescens tested, the strain FDP-15 isolated from groundnut roots was found to be the most efficient and ecologically fit strain. It significantly improved groundnut seed germination, nodulation, dry matter production and pod yield, besides protecting plants from sclerotial infection. When compared to captan fungicide treatment, FDP-15 increased the seedling emergence by 16 percent, nodulation by 18 percent, dry matter production by 40 per cent and total pod yield by 65 per cent, and resulted in 18 per cent of survival of plants till harvest. These were further improved under biogas manure amended conditions.