Comparative efficacy of some oil seed cakes and extracts against root-knot nematode (Meloidogyne graminicola) infection in rice

Abstract

Screen-house investigations were conducted to study the influence of seed cakes of castor, neem and Simarouba glauca, at 2.5 and 5 g/kg soil as soil application and seed extracts of S. glauca at 2.5 and 5% as root dip and soil drench treatment on the plant growth characters of rice and build up of root-knot nematode, Meloidogyne graminicola. Application of castor cake at 5 g/kg soil enhanced plant growth parameters even in the presence of the nematode. Fewest egg masses of M. graminicola were recorded after neem cake soil application at 5 g/kg soil, root dip + soil drench with 5% and 2.5% seed extract of Simarouba, and soil application of Simarouba cake at 5 g/kg soil.