Seed dressing with Pseudomonas aeruginosa, Paecilomyces lilacinus and Trichoderma koningii significantly (p<0.05) reduced infection of Macrophomina phaseolina, Rhizoctonia solani and Fusarium solani on cotton roots in pot experiments and in field. Combined use of P.aeruginosa strain CMG63 with T. koningii produced greater plant height and fresh weight of shoot in field as compared to CMG52 which showed better results in pot experiments.