Antagonistic fungi. The tested Trichoderma isolates were obtained from different habitats in
Thailand. These include T121Kh and T114Kb from nutrient solution in hydroponics farm and
forest soil at Nakhon-Ratchasima province, T114So and T112Sc from clay soil in organic and
chemical rice field in Suphanburi province, respectively. While, T. com was obtained from
commercial product.