Effect of Volatile and Non-Volatile Metabolites Produced by Native Microorganisms in Biocontrol of Rice Seedborne Pathogens

Several native microorganisms were investigated for their ability to biocontrol the rice seedborne pathogens by production of volatile and non-volatile diffusible metabolites. Trichoderma viride Tricho-P and Aspergillus teireus (AF) produced inhibitory volatile metabolites which significantly inhibited the growth of the test pathogens There was a reduction of 41.4, 40.0, 34.2% in the growth of Helminthosporium oryzae. Sarocladium orvztie and Trichoconis padwicku. respectively by T viride Tncho-P. The diffusible metabolites produced by A leneus AF2, A leneus AF, A fumigatus Asp, Pemcillium oxahcum SL8, P oxalicum PL5D and T. viride Tricho P were able to bring out complete inhibition of growth of the pathogens.