Main Data :
Valuable data generated on induced suppression of soil-borne pathogens by mycorrhizae has no doubt proved their potentiality in controlling plant pathogens. But, so far, examples of successful practical applications are scarce (Hooker et al., 1994: Linderman, 1994) because of the complexity of this tripartite association (mycorrhiza-soil-palnt) and the direct influence of prevailing environmental conditions. Experiments have only usually tested single mycorrhizal fungus and a single host genotype, diversity within mycorrhizal fungi for biocontrol of plant pathogens is unknown. There are certain pathogenic antagonists, trichoderma, Gliocladium, Pseudomonas, Bacillus and PGPR which cooperate with mycorrhizal fungi for biocontrol and the phytosanitary role of mycorrhizal fungi can be made more effective when integrated with other plant protection measures. Thus, for emploiting the prophylactic activity of mycorrhizal fungi in a best way, the right combinations of factors should be found out, the most important being the selection of appropriate/efficient mycorrhizal fungi.