Keeping woodlands in Wales and Ireland healthy

Most damaging Forest insects

The following table is based on information in "Forestry Commission Handbook 1, Forest Insects: - a guide to insects feeding on trees in Britain" by D Bevan, published by HMSO 1987

It is restricted to those insects with a damage rating of 4 (XXXX) [Severe. Causing severe loss of crop increment, death of individual trees, severe degrade of produce, of young stock or of amenity value.] and 5 (XXXXX) [Very severe. Causing death of crop]

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Agrilus planipennis Fairmaire, 1888

Emerald Ash Borer beetle (Agrilus planipennis  Fairmaire, 1888)
Emerald Ash Borer beetle / Tyllwr Onnen Gwyrddfaen

Type of trees: ASH (FRAXINUS excelsior)
Damage rating: Damage level 4 Exotic

Further information: IMPACT Pest Profile available on: with further information on

Biological Centre Maps: FR: Tree Pest Alert + Advisory Note at: ALSO
Using nature's weapons to battle current and future threats

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