The Korean Journal of Mycology (한국균학회지)

The Korean Society of Mycology (한국균학회)
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First Report of Sclerotinia sclerotiorum Causing Sclerotinia Rot on Ixeridium dentatum in Korea

  • Park, Myung Soo (School of Biological Sciences and Institute of Microbiology, Seoul National University) ;
  • Kim, Young Guk (National Institute of Horticultural and Herbal Science) ;
  • Lee, Sang Won (National Institute of Horticultural and Herbal Science) ;
  • Park, Chun Geun (National Institute of Horticultural and Herbal Science) ;
  • Kim, Yong Il (National Institute of Horticultural and Herbal Science) ;
  • Lee, Eun Song (National Institute of Horticultural and Herbal Science) ;
  • Chang, Jae Ki (National Institute of Horticultural and Herbal Science) ;
  • An, Tae Jin (National Institute of Horticultural and Herbal Science)
  • Received : 2017.10.10
  • Accepted : 2017.11.03
  • Published : 2017.12.01
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Abstract

Sclerotinia rot was observed on Ixeridium dentatum cultivated as a succeeding crop in a garlic field in Seosan-si, Korea during the growing season in 2016 and 2017. Symptoms progressed from the initial irregular, water-soaked spots on main stems to wilting and eventually to plant death. White, cottony mycelia and black, irregular sclerotia formed on the basal stem and on soil surfaces. The optimal temperature of hyphal growth and sclerotia germination were $20^{\circ}C$ and $25^{\circ}C$, respectively. Sequence analysis of the internal transcribed spacer (ITS) regions revealed that the three strains isolated from Ixeridium dentatum are grouped with Sclerotinia sclerotiorum. Three strains were identified as Sclerotinia sclerotiorum based on morphological features, ITS sequence, and pathogenicity test. To the best of our knowledge, this work is the first report of Sclerotinia sclerotiorum causing sclerotinia rot on Ixeridium dentatum in Korea.

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References

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