ROLE OF MUNGBEAN ROOT NODULE ASSOCIATED FLUORESCENT PSEUDOMONAS AND RHIZOBIA IN SUPPRESSING THE ROOT ROTTING FUNGI AND ROOT KNOT NEMATODES IN CHICKPEA (CICER ARIETINUM L.)

摘要

Three isolates each of fluorescent Pseudomonas (NAFP-19, NAFP-31 and NAFP-32) and rhizobia (NFB- 103, NFB107and NFB-109) which were originally isolated from root nodules of mungbean (Vigna radiata) showed significantbiocontrol activity in the screen house and under field condition, against root rotting fungi viz., Macrophomina phaseolina,Fusarium solani, F. oxysporum and Rhizoctonia solani evaluated on chickpea. Biocontrol potential of these isolates wasalso evaluated against Meloidogyne incognita, the root knot nematode. Application of Pseudomonas and rhizobial isolatesas a soil drench, separately or mixed significantly reduced root rot disease under screen house and field conditions.Nematode’s penetration in roots was also found significantly less in rhizobia or Pseudomonas treatments used separately ormixed as compared to control. Fluorescent Pseudomonas treated plants produced greater number of nodules per plant thancontrol plants and about equal to rhizobia treated plants, indicating that root nodule associated fluorescent Pseudomonasenhance root nodulation.