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UK Risk Register Details for Epidiaspis leperii

Pest has been archived

This pest has been assessed for the Risk Register and is considered to pose a low risk to the UK. The information on this pest was correct as of 19/05/2021, but is no longer actively maintained. It will only be updated if new information is received which indicates the potential for a significant increase in risk to the UK.

This record was last updated on 09/02/2022

Common Names

  • European pear scale
  • grey pear scale
  • Italian pear scale
  • pear-tree oyster scale
  • red pear scale

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest is introduced

Pathway Assessed for Entry to UK

  • show / hide
  • Plants for planting (except seeds bulbs and tubers)

Common Pathways

  • show / hide
  • Plants for planting (except seeds bulbs and tubers)

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 2
Impact [1 - 5] 3
Value at Risk [1 - 5] 4
Likelihood x Impact [1 - 25] 9
UK Relative Risk Rating [1 - 125] 36

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated non quarantine pest (Northern Ireland)



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 2
Impact [1 - 5] 3
Value at Risk [1 - 5] 4
Likelihood x Impact [1 - 25] 9
UK Relative Risk Rating [1 - 125] 36

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Bosnia-Herzegovina Unknown Distribution recorded as "Yugoslavia"
Croatia Present
Kosovo Unknown Distribution recorded as "Yugoslavia"
Republic of North Macedonia Unknown Distribution recorded as "Yugoslavia"
Montenegro Unknown Distribution recorded as "Yugoslavia"
Slovenia Present
Slovakia Unknown Distribution recorded as "Czechoslovakia"
Albania Present
Austria Present
Belgium Present
Bulgaria Present
France Present
Germany Present
Greece Present
Hungary Present
Italy Present
Malta Present
Netherlands Present
Norway Present
Poland Present
Portugal Present
Romania Present
Spain Present
Switzerland Present
Türkiye Present
Ukraine Present
Czech Republic Present
Luxembourg Present
Russia Present
Serbia Present
United Kingdom Absent
North America
Mexico Present
United States Present
South America
Argentina Present
Chile Present
Uruguay Present
Algeria Present
Morocco Present
Tunisia Present
Libya Present
Armenia Present
Azerbaijan Present
Georgia Present
Iran Present

Type of Pest

  • Insect (Hemiptera)

Host or Industry at Risk

  • show / hide

Rosaceae, Juglans, Olea

Major Hosts

  • Acer platanoides L.
  • Aesculus hippocastanum L.
  • Arbutus unedo L.
  • Berberis L.
  • Cornus L.
  • Crataegus L.
  • Crataegus monogyna Jacq. em. Lindm.
  • Cydonia oblonga Mill.
  • Ficus L.
  • Gleditsia triacanthos L.
  • Heteromeles M.Roem.
  • Heteromeles arbutifolia (Aiton) M.Roemer
  • Juglans regia L.
  • Juglans
  • Malus Mill.
  • Malus prunifolia var. prunifolia (Willd.) Borkh.
  • Malus pumila Mill.
  • Mespilus germanica L.
  • Olea L
  • Olea europaea Linnaeus
  • Persea Mill.
  • Photinia Lindl.
  • Pistacia L.
  • Prunus L.
  • Prunus avium ssp./var. avium L.
  • Prunus cerasus L.
  • Prunus domestica ssp. domestica L.
  • Prunus dulcis (Mill.) D.A.Webb
  • Prunus persica Batsch
  • Prunus spinosa L.
  • Pyrus L.
  • Pyrus betulifolia Bunge
  • Pyrus communis L.
  • Pyrus pyrifolia (Burm.F.) Nakai
  • Pyrus salicifolia Pall.
  • Ribes L.
  • Ribes nigrum L.
  • Robinia pseudoacacia L.
  • Sorbus L.
  • Sorbus aria (L.) Crantz
  • Sorbus aucuparia var. aucuparia L.
  • Acer negundo

Threats to Protected Cultivation

  • N/A

Forest Tree Pests and Pathogens

  • Broadleaved

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Regulated non quarantine pest (Northern Ireland)

Actions Indicated

  • show / hide


Statutory action in line with legislation in northern Ireland. No statutory action in Great Britain.

General Comments

Scale insect found in parts of mainland Europe and elsewhere, but not known to be present in the UK. Polyphagous on a number of trees and shrubs, with impacts recorded in warmer countries on several hosts including apple, pear and stone fruit trees.

Further Information


  • show / hide

Key uncertainty for pest

Impacts in northern Europe


Current distribution






UK distribution

Risk Records for this Pest