Ocurrence of clubroot caused by Plasmodiophora brassicae on Kohlrabi in Korea

Min A. Song, In Young Choi, Jeong Heub Song, Kui Jae Lee, Hyeon Dong Shin, Victor Galea

Research output: Contribution to journalArticlepeer-review


From 2016 to 2018, approximately 15% of kohlrabi were observed displaying significant clubroot symptoms in farmer’s fields in Jeju, Korea. The initial infection appeared as hypertrophy of root hairs, and as the disease progressed, galls formation occurred on the main roots, finally disease progress resulted in yellowing and wilting of leaves. Pathogenicity was proven by artificial inoculation of plants with resting spore suspension, fulfilling Koch’s postulates. The resting spore is one-celled, spherical and subspherical, colorless, and 3-5 mm in diameter. On the basis of the morphological characteristics and phylogenetic analyses of internal transcribed spacer rDNA, the causal agent was identified as Plasmodiophora brassicae. To our knowledge, this is the first report on the occurrence of P. brassicae on kohlrabi in Korea.

Original languageEnglish
Pages (from-to)33-37
Number of pages5
JournalResearch in Plant Disease
Issue number1
Publication statusPublished - 2019 Mar

Bibliographical note

Publisher Copyright:
© The Korean Society of Plant Pathology.


  • Clubroot
  • Kohlrabi
  • Plasmodiophora brassicae
  • Resting spore

ASJC Scopus subject areas

  • Biotechnology
  • Biochemistry
  • Molecular Biology
  • Agronomy and Crop Science
  • Plant Science


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