Evaluation of isolates of different Trichoderma spp. against Ustilaginoidea virens causing false smut of rice
Keywords:
Bioagents, cultural filtrate, rice, <i>In-vitro</i> screening, potential, <i>Trichoderma</i> spp., volatile metabolitesAbstract
Rice false smut caused by Ustilaginoidea virens (U. virens) is destructive disease affecting rice yield considerably. Eleven isolates of different Trichoderma spp. were isolated from rice rhizosphere. The dual culture assay results revealed that among the eleven isolates of Trichoderma spp., 3 isolates viz., TR-2, TR-1, TV-1 suppressed the growth of U. virens under in vitro conditions with maximum percent inhibition 75.13, 73.40 and 70.21%, respectively. Non-volatile and volatile compounds of Trichoderma sp. (TR-2) were most effective in inhibiting mycelial growth of the pathogen with 74.96% and 68.55% of inhibition, by unsterilized and sterilized cultural filtrates, respectively and 61.81% inhibition by its volatile compounds.
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