บทคัดย่องานวิจัย

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Effect of temperature on antagonistic and biocontrol potential of Trichoderma sp. on Sclerotium rolfsii.

Mukherjee, P. K.; Kanthadai Raghu;

Mycopathologia Year: 1997 Vol: 139 Issue: 3 Pages: 151-155 Ref: 10 ref.

1997

บทคัดย่อ

Effect of temperature on antagonistic and biocontrol potential of Trichoderma sp. on Sclerotium rolfsii.

The effects of temperature on the growth and biocontrol potential of Trichoderma sp. on S. [Corticium] rolfsii were investigated. Experimental results indicated that C. rolfsii and Trichoderma sp. have different temperature optima for growth: 30-35 deg for the pathogen and 25-30 deg C for the antagonist. In dual culture, Trichoderma overgrew C. rolfsii at 25 deg and 30 deg , but at 35 deg and 37 deg , C. rolfsii overgrew the colony of Trichoderma. Trichoderma produced higher concentration of fungitoxic metabolites in broth culture at higher temperatures. In bioassays using ginger slices and whole rhizomes, it was demonstrated that Trichoderma is not very effective in suppressing C. rolfsii at temperatures >30 deg . In light of these results, possible mechanisms of biocontrol of C. rolfsii as a postharvest pathogen is discussed. Storage temperature is suggested to be a critical factor in the biocontrol of C. rolfsii.