UK Risk Register Details for Phyllachora maydis and Microdochium maydis

Please note: there are high levels of uncertainty associated with the risk scores for this pest.

Common Names

  • Black spot: maize
  • Tar spot: maize

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest is introduced

Pathway Assessed for Entry to UK

  • show / hide
  • Plant waste

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] 3
Impact [1 - 5] 4
Value at Risk [1 - 5] 3
Likelihood x Impact [1 - 25] 8
UK Relative Risk Rating [1 - 125] 24

Current Mitigations

  • show / hide

Key mitigation for pest

Regulation

Surveillance

Industry Scheme

Contingency Plan

Awareness

Research

Mitigated Risks

Likelihood [1 - 5] 1
Spread [1 - 5] 3
Impact [1 - 5] 4
Value at Risk [1 - 5] 3
Likelihood x Impact [1 - 25] 4
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 Status Notes
Europe
United Kingdom Absent
North America
Costa Rica Present
Cuba Present
Dominican Republic Present
Guatemala Present
Honduras Present
Haiti Present
Mexico Present
Nicaragua Present
Panama Present
Puerto Rico Present
El Salvador Present
Trinidad and Tobago Present
United States Present P. maydis only
South America
Bolivia Present
Colombia Present
Ecuador Present
Peru Present
Venezuela Present

Type of Pest

  • Fungus

Host or Industry at Risk

  • show / hide

Zea mays

Major Hosts

  • Zea mays L.

Threats to Protected Cultivation

  • N/A

Forest Tree Pests and Pathogens

  • N/A

Further Information

PRA Availability

PRA not available

EU and EPPO Listing

Not currently listed

Actions Indicated

  • show / hide

Action

Statutory action on interceptions and outbreaks

General Comments

Fungi found in North America that can cause damage to sweetcorn, particularly if found in combination. Action should be taken on finding either of the two fungi, due to the possibility that the second could arrive and the combination lead to high impacts.

Further Information

Uncertainty

  • show / hide

Key uncertainty for pest

There are uncertainties over the distribution of the second, more damaging fungus, which in particular could have consequences for the scores.

Climate - Cause

Current distribution - Cause

Hosts - Cause

Impact - Cause

Pathways - Cause

Regulation - Cause

Taxonomy - Cause

UK distribution - Cause