UK Risk Register Details for Stereonychus fraxini

Please note: there are high levels of uncertainty associated with the risk scores for this pest.

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
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] 4
Spread [1 - 5] 3
Impact [1 - 5] 2
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 8
UK Relative Risk Rating [1 - 125] 40

Current Mitigations

  • show / hide

Key mitigation for pest

Fraxinus import restrictions



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 3
Impact [1 - 5] 2
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 Status Notes
Bosnia-Herzegovina Present (Widespread)
Germany Present (Unknown Distribution)
France Present (Unknown Distribution)
United Kingdom Absent
Croatia Present (Widespread)
Hungary Present (Widespread)
Italy Present (Limited)
Moldova Present (Widespread)
Poland Present (Widespread)
Romania Present (Widespread)
Serbia Present (Widespread)

Type of Pest

  • Insect (Coleoptera)

Host or Industry at Risk

  • show / hide


Major Hosts

  • Fraxinus angustifolia ssp. angustifolia Vahl
  • Fraxinus excelsior L.
  • Olea europaea Linnaeus
  • Phillyrea latifolia L.
  • Fraxinus pennsylvanica

Threats to Protected Cultivation

  • Both protected crops and outdoor production

Forest Tree Pests and Pathogens

  • Broadleaved

Further Information

PRA Availability

PRA not available

EU and EPPO Listing

not listed

Actions Indicated

  • show / hide


Statutory action on interceptions and outbreaks

General Comments

Pest of ash that is damaging in southern Europe, and unknown potential impact if it reaches the UK. Import restrictions help to mitigate the risk of introduction.

Further Information


  • show / hide

Key uncertainty for pest

Full distribution and ability to spread.

Climate - Cause

Current distribution - Cause

Hosts - Cause

Impact - Cause

Pathways - Cause

Regulation - Cause

Taxonomy - Cause

UK distribution - Cause

Risk Records for this Pest