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First Report of Sclerotinia White Rot Caused by Sclerotinia nivalis on Panax ginseng in Korea

  • Cho, Hye Sun (Ginseng Resource Research Laboratory, Korea Ginseng Corporation) ;
  • Shin, Jeong-Sup (Ginseng Resource Research Laboratory, Korea Ginseng Corporation) ;
  • Kim, Jae-Hyun (Ginseng Resource Research Laboratory, Korea Ginseng Corporation) ;
  • Hong, Tae-Kyun (Ginseng Resource Research Laboratory, Korea Ginseng Corporation) ;
  • Cho, Dae-Hui (Ginseng Resource Research Laboratory, Korea Ginseng Corporation) ;
  • Kang, Je Yong (Ginseng Resource Research Laboratory, Korea Ginseng Corporation)
  • Received : 2012.09.10
  • Accepted : 2013.02.05
  • Published : 2013.03.31

Abstract

Sclerotinia white rot disease was observed on 5 and 6-year-old ginseng (Panax ginseng) roots in Hongchun, Cheorwon, and Yanggu, Gangwon Province, Korea from 2006 to 2010. Symptoms included a brownish watery soft rot of the roots, and black sclerotia were often found on the rotten roots. The causal agent of the disease was identified as Sclerotinia nivalis based on cultural characteristics and sequence analyses of the internal transcribed spacer region of rDNA and ${\beta}$-tubulin gene with 100% sequence similarity. Pathogenicity tests were performed on 2-year-old ginseng roots with mycelium plugs without wounds. A watery soft rot of the roots and black sclerotia were observed 10 days after inoculation. These symptoms were identical to those observed on naturally infected roots. The same fungus was re-isolated from the lesions induced by artificial inoculation. This is the first report of sclerotinia white rot caused by S. nivalis on P. ginseng in Korea.

Keywords

References

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