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Sclerotium blight of Neofinetia falcata Caused by Sclerotium rolfsii in Korea

Sclerotium rolfsii에 의한 소엽풍란 흰비단병

  • Han, Kyung-Sook (Horticultural & Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Lee, Seong-Chan (Horticultural & Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Han, You-Kyoung (Horticultural & Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Kim, Su (Horticultural & Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Kim, Dong-Hwi (Horticultural & Herbal Crop Environment Division, National Institute of Horticultural & Herbal Science, Rural Development Administration)
  • 한경숙 (국립원예특작과학원 원예특작환경과) ;
  • 이성찬 (국립원예특작과학원 원예특작환경과) ;
  • 한유경 (국립원예특작과학원 원예특작환경과) ;
  • 김수 (국립원예특작과학원 원예특작환경과) ;
  • 김동휘 (국립원예특작과학원 원예특작환경과)
  • Received : 2010.10.07
  • Accepted : 2010.11.07
  • Published : 2010.12.01

Abstract

The Sclerotium blight was found on Neofinetia falcata at Yong-in city, Gyenggi-do, Korea. The symptom occurred low leaves yellowish and wilt of a whole plant. Severely infected plants were blighted and dies eventually. White mycelial mats appeared on the surface of basal stem and bulbs and the sclerotia were formed on stems, roots, and sphagnum moss. The sclerotia were spherical in shape, 1~3 mm in size and white to brown in color. The optimum temperature for the growth and sclerotia formation was $25{\sim}30^{\circ}C$ on PDA. On the pathogenicity test, the first symptom was appeared 5 days after inoculation and development to severe stem rot and blight. The causal fungus was identified as Sclerotium rolfsii and we suggested to call that the new Sclerotium blight on Neofinetia falcata caused by Sclerotium rolfsii in Korea.

2010년 2월 경기도 용인시 소엽풍란 재배농가에서 뿌리와 벌브가 심하게 마르고 식물체 전체가 말라죽는 증상이 나타났다. 마른 뿌리와 수태표면에 흰색 곰팡이 균사와 함께 뚜렷한 둥근 형태의 적갈색 균핵이 관찰되었다. 균학적 특징으로 균사는 $25{\sim}30^{\circ}C$에서 가장 활발한 생장을 보였으며, 균핵은 갈색의 둥근형태로 직경은 1~3 mm였다. 병원성 검정결과 발병이 초기부터 빠른 강한 병원성을 보였다. 균학적 특성 조사 결과 Sclerotium rolfsii에 의한 흰비단병으로 동정하였으며 본 병을 소엽풍란 흰비단병으로 명명하였다.

Keywords

References

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