UK Risk Register Details for Xylosandrus crassiusculus

Common Names

  • Apple bark beetle
  • Asian ambrosia beetle
  • Granulate ambrosia beetle

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)
  • Non-squared wood
  • Squared wood

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] 2
Impact [1 - 5] 3
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 60

Current Mitigations

  • show / hide

Key mitigation for pest



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 4
Spread [1 - 5] 2
Impact [1 - 5] 3
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 60

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country Status Notes
Spain Present (Limited)
France Present (Limited) under eradication
United Kingdom Absent
Italy Present (Limited)
North America Present
Costa Rica Present
Guatemala Present
Panama Present
United States Present (Limited)
South America
Brazil Present
French Guiana Present
Australia Present (Limited)
New Zealand Present
Papua New Guinea Present
Palau Present
Samoa Present
Congo (Democratic Rep.) Present
Cote d'Ivoire Present
Cameroon Present
Gabon Present
Ghana Present
Equatorial Guinea Present
Kenya Present
Madagascar Present
Mauritania Present
Mauritius Present
Nigeria Present
Seychelles Present
Sierra Leone Present
Tanzania Present
Bhutan Present
China Present
Indonesia Present
Israel Present
India Present
Japan Present
North Korea Present
South Korea Present
Sri Lanka Present
Myanmar Present
Malaysia Present
Nepal Present
Philippines Present
Pakistan Present
Thailand Present
Taiwan Present
Vietnam Present

Type of Pest

  • Insect (Coleoptera)

Host or Industry at Risk

  • show / hide

Boradleaved trees

Major Hosts

  • Alnus Mill.
  • Betula L.
  • Ceratonia siliqua L.
  • Cornus L.
  • Eucalyptus L'Herit.
  • Fraxinus L.
  • Magnolia L.
  • Malus Mill.
  • Platanus L.
  • Populus L.
  • Prunus L.
  • Quercus L.
  • Salix L.
  • Ulmus L.
  • Vitis L.
  • Broadleaved trees L.

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

  • Broadleaved

Further Information

PRA Availability

UK (2015)

EU and EPPO Listing

EPPO Alert

Actions Indicated

  • show / hide


Statutory action against findings. Research into temperature development requirements. Europe-wide PRA. Awareness raising with industry and targeted surveillance at nurseries and premises where wood is processed.

General Comments

Ambrosia beetle which can affect a wide range of broadleaved trees, widespread in Africa, Asia and parts of the US, with outbreaks in France and Italy. The UK climate is unlikely to be suitable for the pest to thrive and cause significant damage but needs to be investigated through research. A Europe-wide PRA will help inform the case for EU regulation. Premises involved in importing wood and host plants from Italy in particular, where official measures are not being taken, should source material carefully.

Risk Records for this Pest