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Control of Ginseng Damping-Off Disease Using Chitinolytic Bacterial Mixtures
Res. Plant Dis. 2018;24:353-358
Published online December 31, 2018
© 2018 The Korean Society of Plant Pathology.

Young Cheol Kim1, Hyun Chae Chung2, Yeoung Seuk Bae3, and Seur Kee Park4*

1Department of Applied Biology, Chonnam National University, Gwangju 61186, Korea
2Department of Forest Resources, Sunchon National University, Suncheon 57922, Korea
3Ginseng Division, National Institute of Horticular and Herval Science, Eumseong 27709, Korea
4Department of Plant Medicine, Sunchon National University, Suncheon 57922, Korea
*Tel: +82-61-750-3864 Fax: +82-61-750-3268 E-mail: parksk@sunchon.ac.kr ORCID https://orcid.org/0000-0002-7661-7600
Received October 11, 2018; Revised October 24, 2018; Accepted October 24, 2018.
cc This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
An effective bioformulation of mixtures of chitin-degrading bacteria has been used successfully to control plant diseases and nematodes. In this study, the bioformulation approach was assessed to control damping-off disease of ginseng. In pot experiments with soils infested with dapming-off pathogens of ginseng, root-drenchings of Chrobacterium sp. C-61, Lysobacterium enzymogenes C-3, and mixture of two bacterial strains grown in chitin minimal medium were signficantly increased emergence of seeds and reduced damping-off disease incidence of seedlings. Efficacy of the bioformulated product depended on the dose and timing of application. In two-year-old ginseng field, the high control efficacies were achieved by soil drenching of two times with an undiluted product or three times with a 10-fold diluted product. In a To-jik nursery (self soil nursery), biocontrol efficacy of the undiluted product against damping-off disease were similar to that of a seed dressing with fungicide, Tolclofos-methyl WP. These results suggest that the bioformulated product containing Chromobacterium sp. C-61 and L. enzymogenes C-3 could be an effective approach to control of ginseng damping-off disease.
Keywords : Chitinolytic bacteria, Chromobactererium sp., Ginseng damping-off, Lysobacter enzymogenes


December 2018, 24 (4)