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UK Risk Register Details for Chrysanthemum stunt viroid

This record was last updated on 28/11/2022

Common Names

  • Measles of chrysanthemum
  • Stunt of chrysanthemum

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)
  • Seeds

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

Regulated non quarantine pest



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 1
Impact [1 - 5] 2
Value at Risk [1 - 5] 3
Likelihood x Impact [1 - 25] 4
UK Relative Risk Rating [1 - 125] 12

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Russia Present
Belgium Present
Czech Republic Present
Germany Present
Italy Present
Netherlands Present
Poland Present
Slovenia Present
Sweden Present
United Kingdom Present (Limited)
Türkiye Present
Norway Present
North America
United States Present
Canada Present
South America
Colombia Present
Brazil Present
Australia Present
New Zealand Present
South Africa Present
Egypt Present
China Present
India Present
Japan Present
South Korea Present
Taiwan Present
Thailand Present

Type of Pest

  • Virus or Viroid

Host or Industry at Risk

  • show / hide


Major Hosts

  • Argyranthemum frutescens (Linnaeus) Schultz-Bipontinus
  • Argyranthemum sp. Webb
  • Chrysanthemum L.
  • Dahlia pinnata Cav.
  • Chrysanthemum x morifolium Ramat.
  • Oxalis intermedia A.Rich.
  • Petunia x hybrida Horti Vilmorin-Andrieux
  • Tanacetum parthenium (Linnaeus) Schultz- Bipontinus
  • Vinca major L.

Threats to Protected Cultivation

  • Both protected crops and outdoor production

Forest Tree Pests and Pathogens

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Regulated non quarantine pest, EPPO A2

Actions Indicated

  • show / hide


Statutory action against findings on commercially traded plants.

General Comments

A viroid that can cause impacts on chrysanthemum, with a limited distribution in the UK. Spread of the pest is largely through infected plant material.

Risk Records for this Pest