One of the major bottleneck to the wide spread success of beneficial bacterial inoculants in agricultural crops is the inconsistency across crops, seasons, soil and agro-climatic conditions. Not much work has been done on the compatibility of the PGPR bacteria with each other except for some mixed formulations involving either two biocontrol agents or two biofertilizers. Direct field trials using mixed formulations have resulted in increased yield and disease resistance, than individual stains, in crop plants and have been recorded (Nandakumar et al., 2002)