UK Risk Register Details for Agrilus bilineatus

This record was last updated on 09/02/2022

Common Names

  • Two-lined chestnut borer

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

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] 5
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 20
UK Relative Risk Rating [1 - 125] 100

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated quarantine pest (Great Britain)



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 4
Spread [1 - 5] 3
Impact [1 - 5] 5
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 20
UK Relative Risk Rating [1 - 125] 100

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Turkey Present
United Kingdom Absent
North America
Canada Present
United States Present

Type of Pest

  • Insect (Coleoptera)

Host or Industry at Risk

  • show / hide


Major Hosts

  • Castanea dentata (Marsh.) Borkh.
  • Quercus alba L.
  • Quercus coccinea Muenchh.
  • Quercus ellipsoidalis E.J.Hill
  • Quercus lyrata Walt.
  • Quercus macrocarpa Michx.
  • Quercus marilandica Muenchh.
  • Quercus michauxii Nutt.
  • Quercus muehlenbergii Engelm.
  • Quercus nigra L.
  • Quercus palustris Muenchh./Du Roi
  • Quercus prinus L.
  • Quercus robur L.
  • Quercus rubra L.
  • Quercus shumardii var. texana Buckl.
  • Quercus stellata Wangenh.
  • Quercus velutina Lam.
  • Quercus virginiana Mill.

Threats to Protected Cultivation

  • N/A

Forest Tree Pests and Pathogens

  • Broadleaved

Further Information

PRA Availability

EPPO PRA in draft

Regulation and EPPO listing

  • show / hide

Regulated quarantine pest (Great Britain). EPPO Alert list (2018)

Actions Indicated

  • show / hide


Statutory action would be taken on findings of this pest in Great Britain. Publicity would help raise awareness of this pest.

General Comments

A highly damaging wood borer of oak and chestnut, which is commonly associated with oak mortality in the USA, and first reported in Turkey in 2002. European species of oak are known to be vulnerable to attack and the UK climate is suitable for its establishment.

Further Information


  • show / hide

Key uncertainty for pest

Impacts of the pest in Europe compared to North America. The scores have erred on the side of caution for this pest, based on available evidence.


Current distribution






UK distribution

Risk Records for this Pest