Bio-management of rice root-knot nematode (Meloidogyne graminicola)

Abstract

The present field experiments was conducted to know the efficacy of bio agents viz., Paecilomyces lilacinus, Pseudomonas fluorescens, Pochonia chlamydosporia, Trichoderma harzianum, Bacillus subtilis, Consortium of bio-agents (Pseudomonas fluorescens + Trichoderma harzianum) and Carbofuran 3G @ 0.3 ai. alone for management of rice root-knot nematode Meloidogyne graminicola during Kharif-2015 at College of Agriculture, Shivamogga (Latitude: 13° 27’-14° 39’ N, Langitude: 74° 37’-75° 52’ E). The results revealed that all the treatments were significantly superior over check with respect to growth parameters and nematode population. However, the treatment combination of P. fluorescens @20g/m² + T. harzianum @ 20g/m² was found to be the best treatment as it recorded highest plant height (83.33 cm), root length (21.27 cm), maximum grain yield (45.60 q/ha) with least RKI (1.20) and least nematode population (185.44/200g soil) with reduction of 72.77% nematode population followed by Carbofuran 3G @ 0.3 ai /m2, T. harzianum @ 20 g/m², P. fluorescens @ 20 g/m² and B. subtilis @ 20 g/m² respectively.