Antagonistic Mechanism of Antagonistic Trichoderma Isolates against Turfgrass Rhizoctonia solani and Their Resistance to Funficide

The antagonistic experiment between Trichoderma spp.and Rhizoctonia solani, the turfgrass Rhizoctonia blight pathogen occurring in Dalian golf courses,shows that T.harzianum 1,T.harzianum 2,T.hamatum,T.citrinoviride exhibited evident inhibiting effect against the soil-borne pathogens.They are of potential biocontrol agents of the Rhizoctonia solani. Among the tested Trichoderma isolates,T.harzianum 2 showed the strongest antagonistic effect.The examination of antagonistic mechanism showed that Trichoderma spp.hyphae growed quickly, the hyphae could adhere to,coil around the hyphae of the pathogen.Trichoderma spp.could also secret antibiotic substances to cause the pathogen hyphal wall break,hyphae fragment,plasma condense and rupture.In order to improve the effect of multiple prevention and cure,this test do some indoors determination of the restraining ability of fore Trichoderma strains with fore funficides which are often used to control.