UK Risk Register Details for Clavibacter michiganensis subsp. insidiosus

This record was last updated on 10/06/2020

Common Names

  • Bacterial blight of lucerne/alfalfa
  • Bacterial root rot of lucerne/alfalfa
  • Bacterial wilt of lucerne/alfalfa
  • Vascular wilt of lucerne/alfalfa

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

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated non quarantine pest



Industry Scheme

Contingency Plan



Mitigated Risks

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

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country Status Notes
Europe Present
Estonia Present
United Kingdom Unknown
Greece Present
Lithuania Present
Poland Present
Russia Present
North America Present
Canada Present
United States Present
Oceania Present
Australia Present
New Zealand Present
Africa Present
Tunisia Present
Asia Present
Iran Present
Saudi Arabia Present
Turkmenistan Present

Type of Pest

  • Bacterium

Host or Industry at Risk

  • show / hide


Major Hosts

  • Medicago L.
  • Medicago falcata L.
  • Medicago sativa L.
  • Melilotus albus Medikus

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Regulated non quarantine pest, EPPO A2

Actions Indicated

  • show / hide


Statutory action against findings on lucerne seeds.

General Comments

A disease of lucerne that is present in the UK, but with only minor impacts. Use of resistant varieties is an effective way of controlling the pathogen.