Eight Trichoderma isolates were selected based on the results of preliminary screening, which showed 100% inhibitory activity against at least three Phytophthora species using the concentration (100 μg/10 μL) of EtOAc extracts of Trichoderma isolates ( Table 2). Further tests were conducted using MIC, disk diffusion and antibiosis methods with the eight selected Trichoderma isolates.