Abstract:

The aim was to utilize the biological agents of Trichoderma spp.. There were 12 strains of Trichoderma species separated from vegetable fields, New antagonistic Trichoderma spp. were screened through the confront culture and growth rate determination, and the sequence homology of translation elongation factor was analyzed. The results showed that strain Tr-9701 and Tr-1108 had high growth rates and strong inhibitions. With the identification of translation elongation factor of these strains, strain Tr9701 was classified as Trichoderma viride, and Tr1108 was classified as Trichoderma atroviride respectively. Trichoderma viride and Trichoderma atroviride were all inhabitants in vegetable field. The two strains which were used to control vegetable gray mold cooperatively were effective, so it should be studied to utilize Trichoderma spp. with more targets in order to increase control efficiency.