• Pest is introduced

• Plants for planting (except seeds bulbs and tubers)
• Firewood

• Plants for planting (except seeds bulbs and tubers)
• Non-squared wood
• Squared wood
• Wood packaging material
• Firewood

× 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]			3
× 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

Key mitigation for pest

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]			3
× 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
	Austria		Present
	Bulgaria		Present
	Croatia		Present
	Czech Republic		Present
	Denmark		Present
	Estonia		Present
	Finland		Present
	France		Present
	Germany		Present
	Hungary		Present
	Italy		Present
	Latvia		Present
	Netherlands		Present
	Norway		Present
	Poland		Present
	Romania		Present
	Slovakia		Present
	Slovenia		Present
	Sweden		Present
	Switzerland		Present
	Ukraine		Present
	United Kingdom		Absent
South America
	Argentina		Present			Introduced
	Chile		Present			Introduced
Oceania
	Australia		Present			Introduced
Asia
	Russia		Present
	Armenia		Present
	China		Present
	Iran		Present
	Japan		Present
	South Korea		Present
	Taiwan		Present

• Insect (Hymenoptera)

Broadleaved trees

• Acer platanoides L.
• Alnus Mill.
• Alnus japonica (Thunb.) Steud.
• Betula L.
• Betula pubescens Ehrh.
• Carpinus betulus L.
• Celtis sinensis Pers.
• Fagus L.
• Juglans regia L.
• Juglans sinensis (J. x sinensis) (Dc.) Dode
• Populus L.
• Populus alba L.
• Populus deltoides Bartr. Ex Marsh.
• Populus nigra L.
• Populus tremula L.
• Prunus L.
• Prunus serrulata Lindl.
• Prunus yedoensis Matsumura
• Pterocarya stenoptera C.Dc.
• Quercus L.
• Robinia pseudoacacia L.
• Salix L.
• Salix babylonica L.
• Salix chilensis Mol.
• Ulmus L.
• Ulmus davidiana Planch.
• Ulmus japonica (Rehd.) Sarg.
• Zelkova Spach
• Zelkova serrata (Thunb. Ex Murr.) Makino
• Fagus sylvatica L.
• Acer negundo

• N/A

• Broadleaved

PRA Availability

PRA not available

Not currently listed

Action

No statutory action against findings

General Comments

European and Asian wood wasp, widely distributed across those areas (but uncommon). Not known to be present in the UK. Minimal records of damage to healthy trees in its current range. Appears to be usually associated with stressed or damaged trees.

Key uncertainty for pest

Although aspects of the biology are uncertain the scores, based on current knowledge seem to represent the risk.

Climate

Current distribution

Hosts

Impact

Pathways

Regulation

Taxonomy

UK distribution