Among biocontrol fungi, Trichoderma species produce a wide range of bioactive compounds with antifungal activities. In this study, Di-(2-Ethylhexyl) Phthalate (DEHP) is identified via gas chromatography-mass spectrometry (GC-MS) device in Trichoderma atroviridae (1-3) secondary metabolites and its antifungal effectiveness is confirmed. (297)