Combination of fungal and bacterial antagonists for management of root and stem rot disease of soybean

Trichoderma harzianum and plant growth promotory rhizobacteria pseudomonas fluorescens were tested alone and in combinations for their relative biocontrol potential against many soil-borne plant pathogens viz.,rhizoctonia solani,sclerotium rolfsii and macrophomina phaseolina responsible for root and stem rot disease of soybean. investigations under glass-house and field conditions revealed a general trend towards greater suppression and enhanced consistency against the pathogens by mixture of antagonists. application of more than one antagonists of diverse origin is suggested as a reliable means of reducing the variability and increasing the reliability of biological control.