Comparative efficacy of native biocontrol agents and organic additives against Meloidogyne incognita on brinjal cv. Shyamla

Studies were undertaken to determine the comparative efficacy of five biocontrol agents viz., Aspergillus niger strain ANB-2, Trichoderma harzianum strain TH-3, T. virens strain TV-6, Paecilomyces lilacinus strain PL-1 and Pseudomanas fluorescens PF-11 @ 0.05 g/kg each containing 108 cfu/g culture; four organic additives viz., neem (Azadirachta indica) seed powder @ 0.05 g/kg, neem (A. indica) cake @ 0.15 g/kg, mint (Mentha arvensis) manure and farm yard manure @ 0.75 g/kg each against Meloidogyne incognita @ 1000 J2/kg soil under pot conditions. Results revealed that all the treatments significantly improved the fresh and dry weight of plant and reduced the root-knot index, except farmyard manure as compared to untreated inoculated plants. P. lilacinus strain PL-1 was found most effective in improving the fresh and dry weight of plant followed by T. harzianum strain TH-3, neem seed powder, neem cake, T. virens strain TV-6, P. fluorescens strain PF-11, A. niger strain ANB-2, mint manure and farmyard manure respectively.