Abstract
Aims: Strains of Trichoderma spp. produce numerous bioactive secondary
metabolites. The in vitro production and antibiotic activities of the major compounds
synthesized by Trichoderma harzianum strains T22 and T39 against
Leptosphaeria maculans, Phytophthora cinnamomi and Botrytis cinerea were evaluated.
Moreover, the eliciting effect of viable or nonviable biomasses of Rhizoctonia
solani, Pythium ultimum or B. cinerea on the in vitro production of these
metabolites was also investigated.