UK Risk Register Details for Lilioceris merdigera

Common Names

  • Onion 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)

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] 4
Impact [1 - 5] 2
Value at Risk [1 - 5] 4
Likelihood x Impact [1 - 25] 8
UK Relative Risk Rating [1 - 125] 32

Current Mitigations

  • show / hide

Key mitigation for pest



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 4
Spread [1 - 5] 4
Impact [1 - 5] 2
Value at Risk [1 - 5] 4
Likelihood x Impact [1 - 25] 8
UK Relative Risk Rating [1 - 125] 32

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country Status Notes
Europe Present (Widespread)
Austria Present
Belgium Present
Bulgaria Present
Czech Republic Present
Germany Present
Denmark Present
Estonia Present
Spain Present
Finland Present
France Present
United Kingdom Absent
Greece Present
Croatia Present
Hungary Present
Italy Present
Lithuania Present
Luxembourg Present
Latvia Present
Netherlands Present
Poland Present
Romania Present
Sweden Present
Slovenia Present
Slovakia Present
Asia Present (Limited)

Type of Pest

  • Insect (Coleoptera)

Host or Industry at Risk

  • show / hide

Allium, Asparagus, Lilium

Major Hosts

  • Allium L.
  • Allium cepa L.
  • Asparagus officinalis L.
  • Convallaria L.
  • Lilium L.
  • Polygonatum Mill.

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

Further Information

PRA Availability

PRA not available

EU and EPPO Listing

Not currently listed

Actions Indicated

  • show / hide


No statutory actions against findings. Awareness raising by relevant sectors eg. onion growers

General Comments

Beetle pest of certain ornamental and vegetable species, not known to be present in the UK, but closely related to the Lily beetle, which is widespread. Limited prospects for exclusion given the volume of trade with European countries where it is present as a minor pest and scope for confusion with the Lily beetle. Stakeholder groups may wish to monitor for its presence.

Risk Records for this Pest