Several studies have demonstrated that mixtures of PGPRstrains can be more effective due to synergistic modes of action(Raupach and Kloepper, 1998; Jetiyanon and Kloepper, 2002). Inthis study, we formed two mixtures based on results of the prelim-inary screening, including mixture-1 that contained 4 PGPR strains(AP136, AP209, AP282, and AP305) that elicited induced systemicresistance and mixture-2 that contained mixture-1 and 3 other