UK Plant Health Risk Register

Scenario and Pathways

Scenario for Risk Register

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Pest spreads to maximum extent

Pathway Assessed for Entry to UK

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Common Pathways

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Plants for planting (except seeds bulbs and tubers)
Non-squared wood
Bark
Soil/growing medium

Risk Ratings and Current Mitigations

Unmitigated Risks

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Likelihood For "Pest is Introduced" the lowest value of Entry or Establishment, as both are required for a successful introduction. For "Pest Spreads to Maximum Extent" this is an expert judgement on the likelihood of this occurrence. See Guidance Document for more Information Likelihood [1 - 5]				5
Entry The Likelihood of movement of the pest into the UK on a pathway and transfer of that pest to a suitable host. See Guidance Document for more Information Entry [1 - 5]
Establishment The likelihood of the pest surviving and perpetuating in the UK for the foreseeable future after it has entered. See Guidance Document for more Information Establishment [1 - 5]
Spread The rate at which a pest can expand, by natural dispersal only, within an area. See Guidance Document for more Information Spread [1 - 5]			4
Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Impact [1 - 5]				5
Impact - Economic The predicted economic impacts of the pest in the UK. This includes direct effects on yield, quality and possible indirect effects such as trade implications. See Guidance Document for more Information Impact - Economic [1 - 5]				5
Impact - Environmental The proportion of the environmental value of the plant which is likely to be lost through the introduction of the pest. See Guidance Document for more Information Impact - Environmental [1 - 5]		3
Impact - Social The predicted social impacts of a pest in the UK, including effects on tourism, amenities and animal and human health. See Guidance Document for more Information Impact - Social [1 - 5]		3
Value at Risk The value of the hosts or industries at risk from this pest in the UK. See Guidance Document for more Information Value at Risk [1 - 5]				5
Likelihood x Impact The likelihood multiplied by the impact, which shows the risk to the sector. See Guidance Document for more Information Likelihood x Impact [1 - 25]	25
UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information UK Relative Risk Rating [1 - 125]	125

Current Mitigations

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Key mitigation for pest

UK suppression project. Regulated quarantine pest/provisional quarantine pest/regulated non quarantine pest depending on origin of isolate.

Regulation

Surveillance

Industry Scheme

Contingency Plan

Awareness

Research

Mitigated Risks

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Likelihood For "Pest is Introduced" the lowest value of Entry or Establishment, as both are required for a successful introduction. For "Pest Spreads to Maximum Extent" this is an expert judgement on the likelihood of this occurrence. See Guidance Document for more Information Likelihood [1 - 5]			4
Entry The Likelihood of movement of the pest into the UK on a pathway and transfer of that pest to a suitable host. See Guidance Document for more Information Entry [1 - 5]
Establishment The likelihood of the pest surviving and perpetuating in the UK for the foreseeable future after it has entered. See Guidance Document for more Information Establishment [1 - 5]
Spread The rate at which a pest can expand, by natural dispersal only, within an area. See Guidance Document for more Information Spread [1 - 5]			4
Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Impact [1 - 5]			4
Impact - Economic The predicted economic impacts of the pest in the UK. This includes direct effects on yield, quality and possible indirect effects such as trade implications. See Guidance Document for more Information Impact - Economic [1 - 5]			4
Impact - Environmental The proportion of the environmental value of the plant which is likely to be lost through the introduction of the pest. See Guidance Document for more Information Impact - Environmental [1 - 5]		2
Impact - Social The predicted social impacts of a pest in the UK, including effects on tourism, amenities and animal and human health. See Guidance Document for more Information Impact - Social [1 - 5]			4
Value at Risk The value of the hosts or industries at risk from this pest in the UK. See Guidance Document for more Information Value at Risk [1 - 5]				5
Likelihood x Impact The likelihood multiplied by the impact, which shows the risk to the sector. See Guidance Document for more Information Likelihood x Impact [1 - 25]	16
UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information UK Relative Risk Rating [1 - 125]	80

Proposed Actions

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Regulation

Deregulation

Management By Industry

Targeted Survey

PRA

Contingency Plan

Publicity

Research

Distribution and Pest Details

Distribution

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Country / Territory		Status	Notes
Europe
	Belgium	Present
	Croatia	Present
	Denmark	Present
	Finland	Present
	France	Present
	Germany	Present
	Greece	Present
	Ireland	Present
	Lithuania	Present
	Netherlands	Present
	Poland	Present
	Slovenia	Present
	Italy	Absent	Eradicated
	Serbia	Present
	Norway	Present
	Switzerland	Present
	Spain	Absent	Pest eradicated
	Sweden	Absent	Eradicated
	United Kingdom	Present (Limited)
	Czech Republic	Present	under eradication
North America
	United States	Present (Limited)
	Canada	Present (Limited)
South America
	Argentina	Present
Asia
	Japan	Present

Type of Pest

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Oomycete

Host or Industry at Risk

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Forestry, Broadleaved trees

Major Hosts

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Acer circinatum Pursh
Acer davidii Franch.
Acer laevigatum Wall.
Acer macrophyllum Pursh
Acer pseudoplatanus L.
Aesculus hippocastanum L.
Arbutus menziesii Pursh
Arbutus unedo L.
Arctostaphylos manzanita Parry
Arctostaphylos uva-ursi (L.) Spreng.
Ardisia japonica (Thunb.) Blume
Betula pendula Roth
Calluna vulgaris (L.) Hull.
Calycanthus occidentalis Hook. & Arn.
Camellia L.
Castanea sativa Mill.
Ceanothus thyrsiflorus Esch.
Cercis chinensis Bunge
Choisya ternata H.B.K.
Cornus capitata Wall.
Cornus kousa (Buerg.) Hance
Corylopsis spicata Sieb. & Zucc.
Corylus cornuta Marsh.
Drimys winteri J.R. & G.Forst.
Eucalyptus haemastoma Sm.
Fraxinus excelsior L.
Fraxinus latifolia Benth.
Garrya elliptica Dougl. Ex Lindl.
Gaultheria procumbens L.
Gaultheria shallon Pursh
Griselinia littoralis Raoul
Hamamelis intermedia (H. x intermedia) Rehd.
Hamamelis mollis Oliv.
Hamamelis virginiana L.
Heteromeles arbutifolia (Aiton) M.Roemer
Ilex aquifolium L.
Ilex latifolia Thunb.
Kalmia angustifolia L.
Larix Mill.
Larix decidua Mill.
Larix kaempferi (Lamb.) Carriere
Laurus nobilis L.
Leucothoe axillaris (Lam.) D.Don
Leucothoe fontanesiana (Steud.) Sleumer
Lithocarpus densiflorus (Hook. & Arn.) Rehd.
Lithocarpus glaber (Thunb.) Nakai
Lonicera hispidula Dougl. Ex Torr. & Gray
Magnolia acuminata L.
Magnolia delavayi Franch.
Magnolia denudata Desr.
Magnolia grandiflora L.
Magnolia kobus Dc.
Magnolia salicifolia (Sieb. & Zucc.) Maxim.
Magnolia stellata (Sieb. & Zucc.) Maxim.
Magnolia x soulangiana Soulange-Bodin
Nerium oleander L.
Nothofagus obliqua (Mirbel) Oerst./Blume
Osmanthus decorus (Boiss. & Bal.) Kasapl.
Osmanthus delavayi Franch.
Osmanthus fragrans Lour.
Osmanthus heterophyllus (Gidon) P.S.Green
Parrotia persica (Dc.) C.A.Mey.
Photinia fraseri (Photinia x fraseri) Dress
Pieris floribunda (Pursh Ex Sims) Benth. & Hook.F.
Pieris japonica (Thunb.) D.Don Ex G.Don
Pittosporum undulatum Vent.
Prunus laurocerasus L.
Prunus lusitanica L.
Pseudotsuga menziesii var. menziesii (Mirbel) Franco
Pyracantha koidzumii (Hayata) Rehd.
Quercus L.
Quercus acuta Thunb.
Quercus agrifolia Nee
Quercus cerris L.
Quercus chrysolepis Liebm.
Quercus falcata Michx.
Quercus ilex L.
Quercus kelloggii Newb.
Quercus petraea (Matt.) Liebl.
Quercus phillyraeoides Gray
Quercus robur L.
Quercus rubra L.
Rhododendron L.
Rhododendron ponticum L.
Ribes laurifolium Jancz.
Rosa gymnocarpa Nutt.
Rosa rugosa Thunb.
Rubus spectabilis Pursh
Salix caprea L.
Schima argentea Pritzel
Schima wallichii (Dc.) Korth./Choisy
Sequoia sempervirens (D.Don) Endl.
Syringa vulgaris L.
Taxus baccata L.
Taxus brevifolia Nutt.
Taxus x media Rehder
Torreya californica Torr.
Tsuga heterophylla (Rafin.) Sarg.
Umbellularia californica (Hook. & Arn.) Nutt.
Vaccinium intermedium (V. X Intermedium) Ruthe
Vaccinium myrtillus L.
Vaccinium ovatum Pursh
Vaccinium vitis-idaea L.
Viburnum L.
Fagus sylvatica L.
Castanopsis orthacantha
Adiantum jordani Muell.
Clintonia andrewsiana Torr.
Distylium myricoides Hemsl.
Dryopteris arguta (Kaulfuss) Watt
Osmorhiza berteroi DC.
Vancouveria planipetala Calloni

Threats to Protected Cultivation

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Forest Tree Pests and Pathogens

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Broadleaved & Coniferous

Further Information

PRA

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PRA Availability

EU (2009)

Regulation and EPPO listing

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Great Britain: regulated quarantine pest (non-European isolates); provisional quarantine pest (European isolates). Northern Ireland: regulated quarantine pest (non-EU isolates); regulated non quarantine pest (EU isolates). EPPO A2

Actions Indicated

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Action

Statutory action in line with the applicable legislation

General Comments

Pathogen of larch and other hosts subject to a containment strategy in the UK, reflecting its presence in wider environment/forestry settings in some areas.

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Department for Environment, Food & Rural Affairs

Departmentfor EnvironmentFood & Rural Affairs

UK Risk Register Details for Phytophthora ramorum

Common Names

PRA Document

Scenario and Pathways

Scenario for Risk Register

Pathway Assessed for Entry to UK

Common Pathways

Risk Ratings and Current Mitigations

Unmitigated Risks

Current Mitigations

Key mitigation for pest

Regulation

Surveillance

Industry Scheme

Contingency Plan

Awareness

Research

Mitigated Risks

Proposed Actions

Proposed Actions

Regulation

Deregulation

Management By Industry

Targeted Survey

PRA

Contingency Plan

Publicity

Research

Distribution and Pest Details

Distribution

Type of Pest

Host or Industry at Risk

Major Hosts

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

Further Information

PRA

PRA Availability

Regulation and EPPO listing

Actions Indicated

Action

General Comments

Risk Records for this Pest

Department
for Environment
Food & Rural Affairs