Development of formulation of fluorescent pseudomonads and its evaluation on bio-management of blast of rice

Fluorescent Pseudomonads (Pseudomonas fluorescensandP. putida) were formulated in talc, bentonite, palm oil and coconut oil for the management of blast disease of rice. The formulated products showed promising shelf-value. The formulated products were evaluated by root dipping of rice seedlings and foliar spray followed by inoculation withM. oryzaein pots. All growth parameters, yield parameters, incidence and severity of blast or rice were significantly influenced at every growth stage of rice. Yield contributing parameters were increased significantly giving the highest benefit cost ratio (BCR) compared to untreated control. Among the treatments, T-11(10% BdPf-8 Talc) and T-13(1% BdPf-8 Palm Oil) gave the highest yield 5.18 t/ha and 5.13 t/ha with the highest BCR 2.10 and 2.08, respectively. A negative correlation was observed among vegetative parameters, disease incidence and disease severity.Pseudomonas fluorescens(BdPf-8) can be a potential candidate for commercial production for controlling blast or rice.