Journal of General Plant Pathology

, Volume 85, Issue 6, pp 436–439 | Cite as

First report of black root rot of lettuce in Japan caused by Berkeleyomyces rouxiae

  • Rei Nakane
  • Shizue Miki
  • Kentaro Ikeda
  • Hiroshi Sakai
  • Kazuo Hayashi
  • Toshiyuki UsamiEmail author
Disease Note


In August 2016, lettuce plants (Lactuca sativa) cultivated in Gunma Prefecture became stunted and often wilted. Dark brown to black lesions were observed on roots of diseased plants. Most small feeder roots were lost. Fungi isolated from lesions on roots were identified as Berkeleyomyces rouxiae based on their morphological and genetic characteristics. Pathogenicity of this fungus on lettuce was confirmed by inoculation and reisolation. This report is the first of black root rot caused by B. rouxiae on lettuce in Japan.


Chalara elegans Lactuca sativa Soilborne pathogen Thielaviopsis basicola 



We thank Dr. Wilma Nel, Dr. Tuan Duong, and Prof. Wilhelm de Beer (Forestry and Agricultural Biotechnology Institute, University of Pretoria, South Africa) for providing nucleotide sequences and other fungal information. We are grateful to Prof. M. Shishido (Graduate School of Horticulture, Chiba Univ.) for checking our manuscript.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Human and animal rights statement

This article does not contain any studies with human participants or animals performed by any of the authors.

Supplementary material

10327_2019_860_MOESM1_ESM.xlsx (11 kb)
Supplementary file1 (XLSX 10 kb)


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Copyright information

© The Phytopathological Society of Japan and Springer Japan KK, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Graduate School of HorticultureChiba UniversityMatsudoJapan
  2. 2.Gunma Agricultural Technology CenterIsesakiJapan
  3. 3.Gunma Prefectural OfficeMaebashiJapan
  4. 4.Gunma Prefecture Tonenumata General Agricultural OfficeNumataJapan

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