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UK Risk Register Details for Thekopsora minima

This record was last updated on 25/11/2022

Common Names

  • leaf rust of blueberry

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest is introduced

Pathway Assessed for Entry to UK

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

Common Pathways

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

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 4
Spread [1 - 5] 3
Impact [1 - 5] 3
Value at Risk [1 - 5] 3
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 36

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated non-quarantine pest (Great Britain)



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 4
Spread [1 - 5] 3
Impact [1 - 5] 3
Value at Risk [1 - 5] 3
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 36

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Spain Present (Limited)
Portugal Absent under eradication
Netherlands Present (Limited)
United Kingdom Present (Unknown Distribution)
Germany Present (Limited)
Belgium Absent Eradicated.
Sweden Absent Eradicated
North America
Canada Present
Mexico Present
United States Present (Limited)
South America
Brazil Present
Colombia Present
New Zealand Present
Australia Present (Limited)
South Africa Present
Japan Present
China Present

Type of Pest

  • Fungus

Host or Industry at Risk

  • show / hide


Major Hosts

  • Gaylussacia baccata (Wangenh.) K.Koch
  • Gaylussacia frondosa (L.) Torr. & Gray
  • Leucothoe D.Don
  • Lyonia ovalifolia (Wall.) Drude
  • Menziesia pilosa (Michx.) Juss.
  • Rhododendron canadense (L.) Torr.
  • Rhododendron canescens (Michx.) Sweet
  • Rhododendron lutescens Franch.
  • Rhododendron ponticum L.
  • Rhododendron prunifolium (Small) Millais
  • Rhododendron viscosum (L.) Torr.
  • Tsuga canadensis (L.) Carr.
  • Tsuga diversifolia (Maxim.) Mast.
  • Tsuga sieboldii Carr.
  • Vaccinium L.
  • Vaccinium angustifolium Ait.
  • Vaccinium ashei Reade
  • Vaccinium corymbosum L.
  • Vaccinium erythrocarpum Michx.

Threats to Protected Cultivation

  • Both protected crops and outdoor production

Forest Tree Pests and Pathogens

  • Coniferous

Further Information

PRA Availability

EPPO (2017)

Regulation and EPPO listing

  • show / hide

Regulated non-quarantine pest (Great Britain). EPPO A2

Actions Indicated

  • show / hide


Statutory action against findings on specified host plants for planting in Great Britain

General Comments

Rust fungus affecting blueberry and hemlock. This fungus has been detected in parts of Europe. There is some uncertainty about the suitability of UK native host species.

Further Information


  • show / hide

Key uncertainty for pest

Full host range including suitability of UK native plants.


Current distribution






UK distribution

Risk Records for this Pest