Occurrence and Characterization of Leaf Spot Caused by Septoria melissae on Lemon Balm in Korea

Seon Ah Yang, In Young Choi, Ho Jong Ju, Kui Jae Lee, Victor Galea, Hyeon Dong Shin

Research output: Contribution to journalArticlepeer-review


Leaf spot on lemon balm is frequently observed in Korea, causing considerable damage to crops. In 2014 and 2015, the occurrence of leaf spot was observed in several production greenhouses at Suwon, Gongju, and Namwon in Korea. Symptoms on lower leaves initially developed as small, distinct, discolored lesions, which enlarged progressively turning into dark brown, angular spots surrounded by purplish-brown margins. Based on the morphological characteristics and sequence analysis of actin (ACT), translation elongation factor 1-alpha (EF-1α), internal transcribed spacer (ITS), 28S nrDNA (LSU), and RNA polymerase II second largest subunit (RPB2), the fungus associated with the lemon balm leaf spot was determined as Septoria melissae. To the best of our knowledge, this is the first report of lemon balm leaf spot caused by S. melissae in Asia as well as in Korea.

Original languageEnglish
Pages (from-to)495-500
Number of pages6
Issue number6
Publication statusPublished - 2020 Dec

Bibliographical note

Funding Information:
This work was supported by Korea Institute of Planning and Evaluation for Technology in Food, Agriculture and Forestry (IPET) through Crop Viruses and Pests Response Industry Technology Development Program, funded by Ministry of Agriculture, Food and Rural Affairs (MAFRA) (Project No. 320043-05) and research funds for newly appointed professor of Jeonbuk National University in 2019 to IYC.

Publisher Copyright:
© 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group on behalf of the Korean Society of Mycology.


  • First report
  • Melissa officinalis
  • Septoria melissae
  • medicinal plant
  • multigene phylogenetic analysis

ASJC Scopus subject areas

  • Microbiology
  • Infectious Diseases


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