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

This record was last updated on 21/02/2022

Common Names

  • Decline of pear
  • Leaf curl of pear
  • Moria disease of pear
  • Parry's disease of pear
  • PD
  • 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
  • Plants for planting (except seeds bulbs and tubers)

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 2
Impact [1 - 5] 3
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 12

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] 3
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 12

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Albania Present
Bosnia-Herzegovina Present
Moldova Present
Switzerland Present
Serbia Present
Türkiye Present
United Kingdom Present (Limited)
Norway Present
Bulgaria Present
Austria Present
Belgium Present
Croatia Present
Czech Republic Present
France Present
Germany Present
Greece Present
Hungary Present
Italy Present
Netherlands Present
Poland Present
Portugal Present
Slovakia Present
Slovenia Present
Spain Present
North America Present
Canada Present
United States Present
South America
Chile Present
Argentina Present
Libya Present
Tunisia Present
Asia Present
Azerbaijan Present
Iran Present
Lebanon Present
Israel Present (Limited) Under official control

Type of Pest

  • Phytoplasma

Host or Industry at Risk

  • show / hide

Pyrus communis

Major Hosts

  • Cydonia oblonga Mill.
  • 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

Phytoplasma pest of pears, already present in the UK with its vector. Industry may want to review their management practices.