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UK Risk Register Details for Globodera pallida Non-European Strains

This record was last updated on 03/04/2023

Common Names

  • Cyst nematode
  • Pale potato cyst nematode
  • Potato cyst nematode
  • White potato cyst nematode

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest is introduced

Pathway Assessed for Entry to UK

  • show / hide
  • Bulbs or tubers

Common Pathways

  • show / hide
  • Bulbs or tubers
  • Fruits or vegetables
  • Soil/growing medium

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 1
Impact [1 - 5] 4
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

Regulated quarantine pest



Industry Scheme

Contingency Plan



Mitigated Risks

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

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
United Kingdom Absent
North America
Canada Present (Limited)
United States Present (Limited)
South America
Bolivia Present
Chile Present
Colombia Present
Ecuador Present
Peru Present
Venezuela Present
Argentina Absent G. pallida is considered as absent from Argentina.
New Zealand Present
Kenya Present
Algeria Present
Tunisia Present
Morocco Present (Limited) Present, restricted distribution
India Present
Iran Present
Pakistan Present
Japan Present
Central America
Costa Rica Present (Limited)
Panama Present (Limited)

Type of Pest

  • Nematode (Tylenchida)

Host or Industry at Risk

  • show / hide

Solanum tuberosum

Major Hosts

  • Allium cepa L.
  • Allium cepa var. aggregatum L.
  • Allium porrum L.
  • Asparagus officinalis L.
  • Beta vulgaris L.
  • Brassica L.
  • Capsicum L.
  • Dahlia Cav.
  • Fragaria L.
  • Gladiolus L.
  • Hyacinthus L.
  • Iris L.
  • Lilium L.
  • Solanum lycopersicum L.
  • Narcissus L.
  • Solanum L.
  • Solanum melongena L.
  • Solanum tuberosum L.
  • Tulipa L.
  • Plants (general)

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

Further Information

PRA Availability

EFSA (2012)

Regulation and EPPO listing

  • show / hide

Regulated quarantine pest, EPPO A2

Actions Indicated

  • show / hide


Statutory action against findings.

General Comments

Nematode pest, European populations of which are already present in UK. The main risk is new populations can be introduced with damaging impacts. Main pathways are prohibited which mitigate against this threat.