765MANAGEMENT OF RENIFORM NEMATODE, ROTYLENCHU LU SRENI FORMIS IN CASTOR (Ricinus communis L.)The present study was conducted at Tapioca and Castor Research Station, Yethapur and at a farmer’s field at Sandhiyur, Salem district of Tamil Nadu, India to evaluate the efficacy of PGPR Pseudomonas fluorescens as seed treatment and soil application in managing population of reniform nematode, Rotylenchulus reniformis in castor under field conditions. Observations on the soil and root population of reniform nematode, Rotylenchulus reniformis in castor (var.YRCH-1) at harvest revealed that the population was the lowest in soil application of the bioagent Pseudomonas fluorescens application @ 2.5 kg/ha (by 47.32 per cent reduction in soil population and 62.75 per cent reduction in root population) with enhanced seed yield (33.86 per cent increase) and with the highest cost benefit ratiopoornimamurtysista@gmail.comResearch7102016Reniform nematode,Castor,Bioagent, Pseudomonas fluorescensK. PoornimaDepartment of Nematology, Tamil Nadu Agricultural University, Coimbatore-641 003, Tamil Nadu, India