UK Risk Register Details for Eutypella parasitica

This record was last updated on 19/03/2022

Common Names

  • Canker of Acers
  • Eutypella canker

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

Current Mitigations

  • show / hide

Key mitigation for pest

Acer is temporarily prohibited from outside the EU, E. parasitica is present in the EU so this mitigation is not considered to affect the entry score.



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 1
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 / Territory Status Notes
Italy Present
United Kingdom Absent
Slovenia Present
Croatia Present (Limited)
Austria Present
Czech Republic Present (Limited) under eradication
Poland Present (Limited)
Hungary Present (Limited)
Germany Present
North America
Canada Present
United States Present

Type of Pest

  • Fungus

Host or Industry at Risk

  • show / hide


Major Hosts

  • Acer campestre L.
  • Acer cappadocicum Gled.
  • Acer heldreichii Orph. Ex Boiss.
  • Acer hyrcanum Fisch. & Mey.
  • Acer pensylvanicum L.
  • Acer platanoides L.
  • Acer pseudoplatanus L.
  • Acer rubrum L.
  • Acer saccharum Marsh.
  • Acer saccharum ssp. nigrum Marsh.
  • Acer negundo

Threats to Protected Cultivation

  • N/A

Forest Tree Pests and Pathogens

  • Broadleaved

Further Information

PRA Availability

EPPO (2008)

Regulation and EPPO listing

  • show / hide

Not currently listed

Actions Indicated

  • show / hide


Statutory action against interceptions. Survey work recommended, to establish if E. parasitica is present in the UK.

General Comments

Fungal pathogen of maples and sycamore, present in parts of Europe and beyond. Unlikely to cause significant damage if introduced to the UK, but statutory action would be taken against interceptions as a precaution.

Risk Records for this Pest