Effect of Trichoderma Spp. on the growth of Macrophomina phaseouna*

The pathogen Macrophomina phaseolina was isolated from cotton seed. The bioagents viz., Trichoderma virde, T. hamatum, T. harzianum, T. longiforum and T. koningii were tested for their antagonistic property against M. phaseolina by direct bit placement method. All the biological agents were significantly superior over control in checking the growth of M. phaseolina. Among all the biological agents T. viride was significantly superior biological agent in inhibiting the growth of the pathogen.