ORIGINAL ARTICLE
Report on emerging foliar soft rot disease on ginseng Panax vietnamensis and the identification of Neocosmospora ipomoeae and Fusarium miscanthi as the causal pathogens
1
Medicinal Herbal Resources, National Institute of Medicinal Materials, Quang Trung, 1000, Hanoi, Vietnam
2
Agricultural Microbiology, VNU Institute of Microbiology and Biotechnology, Xuan Thuy, 1000, Hanoi, Vietnam
These authors had equal contribution to this work
A - Research concept and design; B - Collection and/or assembly of data; C - Data analysis and interpretation; D - Writing the article; E - Critical revision of the article; F - Final approval of article
Submission date: 2024-03-15
Acceptance date: 2024-06-18
Online publication date: 2025-12-18
Corresponding author
Hang Thuy Dinh
Agricultural Microbiology, VNU Institute of Microbiology and Biotechnology, Xuan Thuy, 1000, Hanoi, Vietnam
Agricultural Microbiology, VNU Institute of Microbiology and Biotechnology, Xuan Thuy, 1000, Hanoi, Vietnam
Journal of Plant Protection Research 2024;64(4):373-380
HIGHLIGHTS
- Foliar soft rot disease has been reported for the first time on Panax ginseng
- The disease was recorded in all surveyed ginseng farms with an incidence of 2 – 26%
- Pathogens causing the disease were Neocosmospora ipomoeae and Fusarium miscanthi
- The report raises a concern about measures to control this disease on Panax ginseng
KEYWORDS
TOPICS
ABSTRACT
In the spring-summer season of 2022, a disease outbreak occurred in Kon Tum province,
the native habitat of Panax vietnamensis var. vietnamensis (Ngoc Linh ginseng), affecting
(scattered) a farming area of more than 50,000 ginseng plants. In relation to this a survey
was conducted on a total area of 15 ha, covering ginseng farms in Kon Tum and some
other main ginseng planting areas in Vietnam. Two main foliar diseases were recorded in
the survey: a previously reported anthracnose disease and a new foliar soft rot disease that
occurred with a disease incidence of 1–30% and 2–26%, respectively. The latter was not
reported for other Panax ginseng varieties, but only for P. vietnamensis. Among 79 fungal
strains isolated from infected leaves, two strains NL5 and KT2.1.2 were identified as true
pathogens causing foliar soft rot disease according to the results of pathogenicity tests (following Koch’s postulates), which confirmed a disease index of 12% for both strains. Based on microscopic morphology and comparative analyses of ITS, TEF1, and BT2 sequences,
the two strains were identified as Neocosmospora ipomoeae NL5 and Fusarium miscanthi
KT2.1.2. The newly discovered foliar soft rot disease on ginseng P. vietnamensis and the
associated pathogens N. ipomoeae and F. miscanthi reported in this study raised concern
about measures that should be taken to control this disease on Panax ginseng.
FUNDING
The study was supported by the research Grant
SNKT2022 from Vietnam National University Hanoi.
RESPONSIBLE EDITOR
Ewa Moliszewska
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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| eISSN: | 1899-007X |
| ISSN: | 1427-4345 |
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