• Pest is introduced

• Plants for planting (with soil)

• Plants for planting (except seeds bulbs and tubers)
• Bulbs or tubers
• Soil/growing medium

× 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 Close Likelihood [1 - 5]			3
× Spread The rate at which a pest can expand, by natural dispersal only, within an area. See Guidance Document for more Information Close Spread [1 - 5]	1
× Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Close Impact [1 - 5]		2
× Value at Risk The value of the hosts or industries at risk from this pest in the UK. See Guidance Document for more Information Close 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 Close Likelihood x Impact [1 - 25]	6
× UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information Close UK Relative Risk Rating [1 - 125]	30

Key mitigation for pest

Prohibition of key pathways

Regulation

Surveillance

Industry Scheme

Contingency Plan

Awareness

Research

× 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 Close Likelihood [1 - 5]		2
× Spread The rate at which a pest can expand, by natural dispersal only, within an area. See Guidance Document for more Information Close Spread [1 - 5]	1
× Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Close Impact [1 - 5]		2
× Value at Risk The value of the hosts or industries at risk from this pest in the UK. See Guidance Document for more Information Close 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 Close Likelihood x Impact [1 - 25]	4
× UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information Close UK Relative Risk Rating [1 - 125]	20

Regulation

Deregulation

Management By Industry

Targeted Survey

PRA

Contingency Plan

Publicity

Research

Country / Territory			Status			Notes
Europe
	United Kingdom		Absent
North America
	Canada		Present
	United States		Present
Asia
	Japan		Present
	South Korea		Present

• Nematode (Dorylaimida)

Most outdoor trees and plants

• Abies holophylla Maxim.
• Camellia sinensis (L.) O.Kuntze
• Cynodon dactylon (L.) Pers.
• Deciduous trees
• Fagus grandifolia Ehrh.
• Fragaria L.
• Fraxinus americana L.
• Ligustrum japonicum Thunb.
• Liquidambar styraciflua L.
• Pinus densiflora Sieb. & Zucc.
• Prunus virginiana L.
• Quercus acutissima Carruth.
• Quercus palustris Muenchh./Du Roi
• Quercus phillyraeoides Gray
• Quercus rubra L.
• Quercus stenophyla (Blume) Makino
• Quercus virginiana Mill.
• Tsuga canadensis (L.) Carr.

• Both protected crops and outdoor production

• Broadleaved & Coniferous

PRA Availability

PRA not available

Not currently listed

Action

No statutory action

General Comments

Nematode pest moving in trade. Present in parts of North America and Asia. Import restrictions on soil and growing media provide some mitigation against risk of introduction.

Key uncertainty for pest

Full host range and geographical distribution

Climate

Current distribution

Hosts

Impact

Pathways

Regulation

Taxonomy

UK distribution