four inddividual PGPR strains selected in preliminary screening were tested again. the four strains that showed the induced systemic resistance were mixed three strains that showed growth promotion were asses to from mixture-2. a total seven treatments were used: four treatments consisting of single PGPR strains, two treatments consisting of strains mixture , and one control. the compatibility of the strains in the mixtures was determined on TSA plates. bacterial strains were streaked at a 90-degree angle from each other. the plates were incubated at 28 c for 48 h and observed for presence or absence of an inhibition zone. absence of inhibition zone indicated compatibility of the tested strains, and the presence of inhibition zones indicated incompatibility. the methods were the same as previously described. the mixture of PGPR strains were prepared by combining equal proportion of each strain prior to application to the seed. the experiment was conducted twice.