2006•Zhongguo caodi xuebaoRequires access

Screening of Antagonistic Trichoderma Isolates Against Turfgrass Fusarium oxysporum and Their Antagonistic Mechanism

Yao Yan-po, LV Guo-zhong, Shujin Zhang, Huang Li-tao

Abstract

The antagonistic experiment between Trichoderma spp.and Fusarium oxysporum,the turfgrass fusarium blight pathogen occurring in Dalian golf courses,showed 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 Fusarium oxysporum.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 make the pathogen hyphal protoplasm break,condense and rupture.

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Key concepts: Fusarium oxysporum, Trichoderma harzianum, Hypha, Trichoderma, Biology, Fusarium, Pathogen, Biological pest control