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UK Risk Register Details for Ralstonia solanacearum

This record was last updated on 06/06/2023

Common Names

  • Brown rot of potato

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest spreads to maximum extent

Pathway Assessed for Entry to UK

  • show / hide

Common Pathways

  • show / hide
  • Plants for planting (except seeds bulbs and tubers)
  • Bulbs or tubers

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 4
Spread [1 - 5] 4
Impact [1 - 5] 5
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 20
UK Relative Risk Rating [1 - 125] 100

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated quarantine pest



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 2
Impact [1 - 5] 3
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 30

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Bulgaria Present Few occurrences.
Italy Present Under eradication.
Portugal Present Few occurrences
Russia Present
Poland Present Present, at low prevalence.
Greece Present
Hungary Present
Netherlands Absent Eradicated
Romania Present
Slovakia Present
Türkiye Present
Belgium Present
Czech Republic Present (Limited) Under eradication
Germany Present
France Present
United Kingdom Present (Limited) Under eradication
Serbia Present
Spain Present
North America
Mexico Present
United States Present
South America
Ecuador Present
Guyana Present
Paraguay Present (Limited)
Suriname Present
Brazil Present
Chile Present
Colombia Present
French Guiana Present
Peru Present
Uruguay Present
Venezuela Present
Argentina Present
Bolivia Present
Papua New Guinea Present
New Zealand Present
Australia Present
New Caledonia Present
South Africa Present
Zambia Present
Reunion Present
Malawi Present
Mauritius Present
Libya Present
Kenya Present
Ethiopia Present
Egypt Present
Cameroon Present
Burundi Present
Burkina Faso Present
Cote d'Ivoire Present
Guinea Present
Madagascar Present
Niger Present
Nigeria Present
Rwanda Present
Tanzania Present
Uganda Present
Pakistan Present
Philippines Present
Nepal Present
Sri Lanka Present
South Korea Present
Japan Present
Iran Present
India Present
Georgia Present
China Present
Malaysia Present
Myanmar Present
Thailand Present
Lebanon Absent Pest Eradicated
Indonesia Absent
Bangladesh Absent
Taiwan Present
Central America
Belize Present
Cuba Present
El Salvador Present
Grenada Present
Honduras Present
Jamaica Present
Martinique Present
Nicaragua Present
Panama Present
Saint Vincent and the Grenadines Present
Trinidad and Tobago Present
Guatemala Present
Guadeloupe Present
Costa Rica Present

Type of Pest

  • Bacterium

Host or Industry at Risk

  • show / hide

Solanum tuberosum

Major Hosts

  • Capsicum L.
  • Capsicum annuum L.
  • Heliconia L.
  • Solanum lycopersicum L.
  • Musa L.
  • Nicotiana Linnaeus
  • Nicotiana tabacum L.
  • Solanum L.
  • Solanum dulcamara L.
  • Solanum melongena L.
  • Solanum nigrum L.
  • Solanum tuberosum L.

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

  • N/A

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Regulated quarantine pest. EPPO A2

Actions Indicated

  • show / hide


Statutory action against findings.

General Comments

Long regulated bacterial pest of potatoes and other crops that is present in some UK rivers. Irrigation restrictions reduce the likelihood of introduction to production facilities.

Further Information


  • show / hide

Key uncertainty for pest

Distribution in UK watercourses is unclear, not all watercourses are surveyed.


Current distribution






UK distribution

Risk Records for this Pest