A greenhouse experiment was conducted to assess the influence of someplant growth-promoting bacteria such as Azospirillum  lipoferum, Azotobacter chroorcoccum and Rhizobium leguminosarumalone or mixed with Arbuscular mycorrhizal fungi as bio fertilizer and bio control agents to enhance the growth   of tomato (Lycopersicon esculentumcv. super strain P), suppressroot knot nematode Meloidogyne incognitaandmicrobial community composition. They improved plant growth through increased nutrient uptake in exchange for photosynthetic carbon from their host. Successful biocontrol has also insuppressedroot knot nematode Meloidogyne incognita.In particular, combinations of AM fungi and PGPF may provide protection for plants at different times, under different conditions. Results indicated that all tested treatments significantly reduced root-knot nematode numbers and remarkable increase in the growth parameters as compared to the untreated inoculated plants. Both oxamyl and mixing of plant growth-promoting bacteria with arbascular mycorrhizae were the most effective treatments in decreasing the final nematode population in soil and roots, number of galls and rate of nematode buildup.