UK Risk Register Details for Rhagoletis completa

Pest has been archived

This pest has been assessed for the Risk Register and is considered to pose a low risk to the UK. The information on this pest was correct as of 22/06/2022, but is no longer actively maintained. It will only be updated if new information is received which indicates the potential for a significant increase in risk to the UK.

This record was last updated on 22/06/2022

Common Names

  • Fly, walnut husk
  • Walnut husk fly

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
  • Plants for planting (except seeds bulbs and tubers)
  • Fruits or vegetables
  • Soil/growing medium

Risk Ratings and Current Mitigations

Unmitigated Risks

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

Current Mitigations

  • show / hide

Key mitigation for pest

Regulation

Surveillance

Industry Scheme

Contingency Plan

Awareness

Research

Mitigated Risks

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

Proposed Actions

Proposed Actions

Regulation

Deregulation

Management By Industry

Targeted Survey

PRA

Contingency Plan

Publicity

Research

Distribution and Pest Details

Distribution

Country / Territory Status Notes
Europe
Switzerland Present
Austria Present
Croatia Present
France Present
Germany Present
Hungary Present
Italy Present
United Kingdom Absent
Slovakia Present
Netherlands Present
Spain Present
North America Present
United States Present
Mexico Present

Type of Pest

  • Insect (Diptera)

Host or Industry at Risk

  • show / hide

Juglans

Major Hosts

  • Juglans californica Wats.
  • Juglans hindsii Jeps. Ex R.E.Smith
  • Juglans major (Torr.) Heller
  • Juglans microcarpa Berlandier
  • Juglans mollis Engelm.
  • Juglans nigra L.
  • Juglans regia L.
  • Juglans

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

  • Broadleaved

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Not currently listed

Actions Indicated

  • show / hide

Action

No statutory action

General Comments

Fruit fly pest of walnut, now present in a number of European countries and beyond, including those from which host fruits are imported. Could potentially establish in warmer parts of the UK.

Risk Records for this Pest