Biocontrol potential of Trichoderma spp. against Phytophthora ramorum

Our study evaluated the biocontrol potential of 51 isolates from nine Trichoderma species against Phytophthora ramorum, the pathogen responsible for Sudden Oak Death and related diseases. We found that rapid growth rates, overgrowth ability, and production of antagonistic metabolites significantly contributed to pathogen suppression, and that efficacy was not solely dependent on growth rate. We also developed a ranking system that integrates isolate vigor and biocontrol efficacy. These findings highlight the importance of multifaceted screening approaches and support the potential of Trichoderma spp. in sustainable biological control strategies for P. ramorum.