REVIEW ON BIOLOGICAL CONTROL OF SOIL BORNE FUNGI IN VEGETABLE CROPS

Biological control involves the use of beneficial organism, their gens, and/ or products, such as metabolites, that reduce the negative effect of plant pathogen and promote positive response by the plant. Disease suppression, a medicated by bio-control agents, is the consequences of the interactions between the plant, pathogen and microbial community. Mycoparasitism, spatial and nutrient competition, antibiosis by enzymes and secondary metabolites and induction of plant defense system are typical bio-control action of these fungi. Faster metabolic rates, anti-microbial metabolites and physiological conformation are key factors which chiefly contributes to antagonism. V.A. Mycorrhizae play major role in biological control of plant diseases owing to their capabilities of amelioration crop yields by multiple role as bio-pesticides and plant growth promotion.