UK Risk Register Details for Frankliniella occidentalis

Common Names

  • alfalfa thrips
  • western flower thrips

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest spreads to maximum extent

Pathway Assessed for Entry to UK

  • show / hide

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] 2
Spread [1 - 5] 2
Impact [1 - 5] 4
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 8
UK Relative Risk Rating [1 - 125] 40

Current Mitigations

  • show / hide

Key mitigation for pest

Unregulated, but significant industry experience from past action



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 2
Impact [1 - 5] 3
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 Status Notes
Albania Present
Austria Present
Bosnia-Herzegovina Present
Belgium Present
Bulgaria Present
Switzerland Present
Cyprus Present
Czech Republic Present
Germany Present
Denmark Present
Estonia Present
Spain Present
Finland Present
France Present
United Kingdom Present (Widespread)
Guernsey Present
Greece Present
Croatia Present
Hungary Present
Ireland Present
Italy Present
Lithuania Present
Latvia Present
Montenegro Present
Macedonia Present
Malta Present
Netherlands Present
Norway Present
Poland Present
Portugal Present
Romania Present
Serbia Present
Russia Present
Sweden Present
Slovenia Present
Slovakia Present
Turkey Present
Ukraine Present
North America Present
Canada Present
Costa Rica Present
Dominican Republic Present
Guadeloupe Present
Guatemala Present
Martinique Present
Mexico Present
Puerto Rico Present
United States Present
South America Present
Argentina Present
Brazil Present
Chile Present
Colombia Present
Ecuador Present
French Guiana Present
Guyana Present
Peru Present
Uruguay Present
Venezuela Present
Oceania Present
Australia Present
New Zealand Present
Africa Present
Algeria Present
Kenya Present
Morocco Present
Reunion Present
Swaziland Present
Uganda Present
South Africa Present
Zimbabwe Present
Azerbaijan Present
China Present
Israel Present
India Present
Iran Present
Japan Present
South Korea Present
Kuwait Present
Kazakhstan Present
Sri Lanka Present
Malaysia Present
Singapore Present
Thailand Present
Uzbekistan Present

Type of Pest

  • Insect (Thysanoptera)

Host or Industry at Risk

  • show / hide

Total protected cultivation

Major Hosts

  • Capsicum annuum L.
  • Cucumis sativus L.
  • Chrysanthemum x morifolium Ramat.
  • Gerbera jamesonii H.Bolus Ex Hook.F.
  • Medicago sativa L.
  • Prunus armeniaca L.
  • Prunus domestica ssp. domestica L.
  • Prunus persica Batsch
  • Rosa L.
  • Saintpaulia ionantha H.Wendl.
  • Solanum L.

Threats to Protected Cultivation

  • Only protected crops

Forest Tree Pests and Pathogens

Further Information

PRA Availability

PRA not available

EU and EPPO Listing


Actions Indicated

  • show / hide


No current Actions Indicated

General Comments

Damaging polyphagous glasshouse pest, present in UK since 1986, managed by industry.

Risk Records for this Pest