Overall, while KACC 40929 showed the strongest activity against Phytophthora pathogens, KACC 40557 and 40931 showed good potential as biocontrol agents, which is in accordance with the results of previous studies ( Etebarian et al., 2000 and Srivastav et al., 2011). There have been many previous studies of T. virens (KACC 40929) as a biocontrol agent; therefore, we used KACC 40557 (T. atroviride/petersenii) for further analysis because it has not yet been investigated in detail, despite showing good potential as a biocontrol agent.