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UK Risk Register Details for Meloidogyne chitwoodi

This record was last updated on 10/07/2023

Common Names

  • Columbia root-knot nematode
  • Nematode, Columbia root-knot
  • Root gall nematode
  • Root-knot 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
  • Plants for planting (except seeds bulbs and tubers)
  • Bulbs or tubers
  • Fruits or vegetables
  • Soil/growing medium

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 1
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

Regulated quarantine pest



Industry Scheme

Contingency Plan



Mitigated Risks

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

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Belgium Present
France Present
Netherlands Present
Denmark Present
Portugal Present
Romania Present (Limited) Under eradication
Germany Present (Limited) Under eradication
Spain Present
Sweden Present Present, under eradication
United Kingdom Absent
Lithuania Present (Limited) Under eradication
Türkiye Present
Switzerland Present (Limited) Under eradication
North America
Mexico Present
United States Present
South America
Argentina Present
Mozambique Present
South Africa Present

Type of Pest

  • Nematode (Tylenchida)

Host or Industry at Risk

  • show / hide

Solanum lycopersicum, Solanum tuberosum

Major Hosts

  • Avena sativa L.
  • Beta vulgaris L.
  • Daucus carota subsp. sativus
  • Gramineae Adans., Nom. Cons.
  • Hordeum vulgare L. em. Lam.
  • Solanum lycopersicum L.
  • Medicago sativa L.
  • Phaseolus vulgaris L.
  • Pisum sativum Linnaeus
  • Scorzonera hispanica L.
  • Solanum tuberosum L.
  • Taraxacum officinale Weber In Wiggers
  • Triticum aestivum L.
  • Zea mays L.

Threats to Protected Cultivation

  • Both protected crops and outdoor production

Forest Tree Pests and Pathogens

  • N/A

Further Information

PRA Availability

EPPO (1995)

Regulation and EPPO listing

  • show / hide

Regulated quarantine pest, EPPO A2

Actions Indicated

  • show / hide


Statutory action against findings.

General Comments

Regulated nematode pest, present in other parts of Europe but not UK. Could be damaging if introduced but no evidence that regulation is failing to inhibit entry.

Risk Records for this Pest