Molecular Plant Pathology (2022) 23, 911-932

Ebrahim Osdaghi, Jan M. van der Wolf, Hamid Abachi, Xiang Li, Solke H. De Boer and Carol A. Ishimaru (2022)
Bacterial ring rot of potato caused by Clavibacter sepedonicus: A successful example of defeating the enemy under international regulations
Molecular Plant Pathology 23 (7), 911-932
Abstract:
Background
Bacterial ring rot of potato (Solanum tuberosum) caused by the gram-positive coryneform bacterium Clavibacter sepedonicus is an important quarantine disease threatening the potato industry around the globe. Since its original description in 1906 in Germany, management of ring rot has been a major problem due to the seedborne nature (via seed tubers not true seeds) of the pathogen allowing the bacterium to be transmitted long distances via infected tubers.
Disease symptoms
On growing potato plants: interveinal chlorosis on leaflets leading to necrotic areas and systemic wilt. On infected tubers: vascular tissues become yellowish brown with a cheesy texture due to bacterial colonization and decay.
Host range
Potato is the main host of the pathogen, but natural infection also occurs on eggplant, tomato, and sugar beet.
Taxonomic status of the pathogen
Class: Actinobacteria; Order: Actinomycetales; Family: Microbacteriaceae; Genus: Clavibacter; Species: Clavibacter sepedonicus (Spieckermann and Kotthoff 1914) Li et al. 2018.
Synonyms (nonpreferred scientific names)
Aplanobacter sepedonicus; Bacterium sepedonicum; Corynebacterium sepedonicum; Corynebacterium michiganense pv. sepedonicum; Clavibacter michiganensis subsp. sepedonicus.
Microbiological properties
Gram-positive, club-shaped cells with creamy to yellowish-cream colonies for which the optimal growth temperature is 20–23°C.
Distribution
Asia (China, Japan, Kazakhstan, Nepal, North Korea, Pakistan, South Korea, Uzbekistan, the Asian part of Russia), Europe (Belarus, Bulgaria, Czech Republic, Estonia, Finland, Georgia, Germany, Greece, Hungary, Latvia, Lithuania, Norway, Poland, Romania, European part of Russia, Slovakia, Spain, Sweden, Turkey, Ukraine), and North America (Canada, Mexico, USA).
Phytosanitary categorization
CORBSE: EPPO A2 list no. 51. EU; Annex designation I/A2.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Full text of article
Database assignments for author(s): Ebrahim Osdaghi, Jan M. van der Wolf, Solke H. De Boer

Research topic(s) for pests/diseases/weeds:
review

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Clavibacter sepedonicus	Potato (Solanum tuberosum)