UK Risk Register Details for 'Candidatus Phytoplasma pyri' on perry pears

Common Names

  • Decline of pear
  • Leaf curl of pear
  • Moria disease of pear
  • Pear leaf curl

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] 5
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 10
UK Relative Risk Rating [1 - 125] 20

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated non quarantine pest



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 2
Impact [1 - 5] 5
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 10
UK Relative Risk Rating [1 - 125] 20

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
Czech Republic Present
Germany Present
Spain Present
France Present
United Kingdom Present (Limited)
Greece Present
Croatia Present
Hungary Present
Italy Present
Moldova Present
Netherlands Present
Norway Present
Poland Present
Portugal Present
Serbia Present
Slovenia Present
Slovakia Present
Turkey Present
North America
Canada See Notes Present in Ontario
United States See Notes Present in California, Connecticut, Oregon, Utah and Washington
South America
Argentina Present
Chile Present
Libya Present
Tunisia Present
Azerbaijan Present
Iran Present
Lebanon Present

Type of Pest

  • Phytoplasma

Host or Industry at Risk

  • show / hide

Pyrus communis

Major Hosts

  • Prunus persica Batsch
  • Pyrus L.
  • Pyrus betulifolia Bunge
  • Pyrus calleryana Decne.
  • Pyrus communis L.
  • Pyrus pyraster Burgsd.
  • Pyrus pyrifolia var. culta (Burm.F.) Nakai
  • Pyrus ussuriensis Maxim.

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 in line with legislation

General Comments

The pest and vector are already present in the UK. Regulation appears to have been ineffective at preventing entry and establishment. Now a regulated non quarantine pest. Industry may also want to review their management practices.