A study was undertaken to evaluate the antagonistic activity of seven Trichoderma species, and two Penicillium
species against brinjal root rot causing pathogen, Macrophomina phaseolina (Tassi) Goid by dual culture plate
technique under in vitro conditions. All the biocontrol agents showed considerable reduction in the growth of the
pathogen. Among the seven Trichoderma species studied, Trichoderma harzianum showed maximum antagonistic
activity of 77.77% followed by T. pseudokoningi 74.44%, T. koningi 72.22%, T. virens, T. viride, T. reesei 70%
each, T. atrovireide 66.66%, Penicillium islandicum 57.77% and P. aurantiogriseum 55.55%. The results of the
present study suggest that T. harzianum has a highly antagonistic potential against the test pathogen.