UK Risk Register Details for Citrus exocortis viroid

This record was last updated on 08/01/2021

Common Names

  • Citrus exocortis
  • Citrus scaly butt
  • Scaly butt of citrus

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest is introduced (to glasshouses)

Pathway Assessed for Entry to UK

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

Common Pathways

  • show / hide
This section is currently being developed as part of the next phase of the Risk Register.

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 1
Impact [1 - 5] 2
Value at Risk [1 - 5] 3
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 18

Current Mitigations

  • show / hide

Key mitigation for pest

Provisional quarantine pest (Great Britain, Northern Ireland may differ)



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 1
Impact [1 - 5] 2
Value at Risk [1 - 5] 3
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 18

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Austria Present
Belgium Present
Cyprus Present
Czech Republic Present
France Present
Germany Present
Greece Present
Italy Present
Netherlands Present
Slovenia Present
Spain Present
United Kingdom Absent
Montenegro Present
Russia Present
North America
Canada Present
Mexico Present
United States Present
South America
Argentina Present
Bolivia Present
Brazil Present
Chile Present
Colombia Present
Peru Present
Suriname Present
Uruguay Present
Venezuela Present
Australia Present
Fiji Present
French Polynesia Present
New Zealand Present
Papua New Guinea Present
Samoa Present
Algeria Present
Cameroon Present
Cote d'Ivoire Present
Egypt Present
Ethiopia Present
Ghana Present
Libya Present
Madagascar Present
Mauritius Present
Morocco Present
Mozambique Present
Nigeria Present
Reunion Present
Sierra Leone Present
Somalia Present
South Africa Present
Sudan Present
Tunisia Present
China Present
India Present
Indonesia Present
Iran Present
Iraq Present
Israel Present
Japan Present
South Korea Present
Lebanon Present
Malaysia Present
Oman Present
Pakistan Present
Philippines Present
Saudi Arabia Present
Syria Present
Taiwan Present
Thailand Present
United Arab Emirates Present
Vietnam Present
Yemen Present
Central America
Cuba Present
Guadeloupe Present
Trinidad and Tobago Present

Type of Pest

  • Virus or Viroid

Host or Industry at Risk

  • show / hide

Solanum lycopersicum

Major Hosts

  • Cestrum aurantiacum Lindl.
  • Citrus limon (Linnaeus) N.L.Burman
  • Citrus paradisi Macfadyen
  • Citrus reticulata Blanco (S. S.)
  • Citrus sinensis (Linnaeus) Osbeck
  • Fortunella Swing.
  • Impatiens walleriana Hook.F.
  • Lycianthes Hassl.
  • Solanum lycopersicum L.
  • Petunia Juss.
  • Poncirus Rafin.
  • Poncirus trifoliata (Linnaeus) Rafinesque
  • Solanum jasminoides Paxt.
  • Verbena L.
  • Citrus

Threats to Protected Cultivation

  • Only protected crops

Forest Tree Pests and Pathogens

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Provisional quarantine pest (Great Britain, Northern Ireland may differ)

Actions Indicated

  • show / hide


Statutory action against findings in tomato plants and as required by legislation.

General Comments

Viroid which affects mainly citrus. Occasional outbreaks on tomato in Europe, but not detected in the UK. Protection of tomato crops remains a priority.

Risk Records for this Pest