Our study was focussed on the identification of the
major secondary metabolites produced by commercially
used strains T22 and T39, their antifungal activity and
involvement during the antagonistic interactions.
Although our data confirmed that T22 and T39 strains
do not produce 6-n-pentyl-6H-pyran-2-one, the most
characterized and important of the Trichoderma antibiotics
(Ghisalberti et al. 1990), other compounds were detected,
including two new secondary metabolites.