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Background: Rice root knot nematode (M. graminicola) is considered as a major threat in basmati rice. The main characteristic symptoms produced by M. graminicola are terminal hook shaped or spiral galls on the roots and other symptoms of damage include patches of stunted and yellowish plants.Methods: A field experiment was conducted in Kharif season of 2018 and 2019 at Sardar Vallabhbhai Patel University of Agriculture and Technology, Meerut (UP) to test the efficacy of bio-agents against the root knot nematode. In this experiment, three bio-agents (Bacillus pumilus, Bacillus subtilis and Pseudomonas florescence) and one chemical (carbofuran) were tested in randomized block design with three replications.Result: It was observed that tested bio-agents and chemical significantly reduced the galls per plant in comparison to the control. At 30 and 60 day after transplanting, minimum (12.7 and 10.0 galls/plant) and (20.9 and 18.8 galls/plant) were recorded with Bacillus subtilis @ 20g/ M2 (2 x 108 cfu/g) during 2018 and 2019, respectively. In case of control, 52.7 and 62.5 galls/plant were recorded at 60 days after transplanting during both years. All the tested bio-agents were found effective in reducing the nematode population, increase the growth parameters and yield of basmati rice.

Efficacy of Bio-agents in the Management of Root Knot Nematode (Meloidogyne graminicola) in Basmati Rice