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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Type of treesOrder + FamilyNamesDamage rating
ASH (FRAXINUS excelsior)COLEOPTERA BuprestidaeAgrilus planipennis Fairmaire, 1888
Emerald Ash Borer beetle
Tyllwr Onnen Gwyrddfaen
Damage level 4
Exotic
BEECH (FAGUS)LEPIDOPTERA TortricidaeCydia fagiglandana Zeller, 1841
Beech seed moth
Gwyfyn Hedyn y Ffawydden
Damage level 4
BROADLEAVES (GENERAL)COLEOPTERA CerambycidaeAnoplophora glabripennis Motschulsky, 1853
Asian Longhorn beetle
Chwilen Hirgorn Asiaidd
Damage level 5 but under eradication
Exotic
BROADLEAVES (GENERAL)LEPIDOPTERA LymantriidaeEuproctis chrysorrhoea Linnaeus, 1758
Browntail moth
Gwyfyn Cynffon llwyd
Damage level 4
BROADLEAVES (GENERAL)COLEOPTERA LyctidaeLyctus brunneus Stephens, 1830
Powder post beetle
Chwilen llwch llif
Damage level 4
CEDAR (CEDRUS)HEMIPTERA LachnidaeCedrobium lapportei Remaudière, 1997
Cedar aphid
Llysleuen Cedrwydden Llau
Damage level 4
CONIFERS (GENERAL)HEMIPTERA AdelgidaeAdelges nordmannianae Eckstein, 1890
Silver fir woolly aphid
Llysleuen Ffynidwydden Arian Wlanog
Damage level 5
CONIFERS (GENERAL)HEMIPTERA AdelgidaeAdelges piceae Ratzeburg, 1844
Balsam woolly aphid
Llysleuen Ffromlys Wlanog
Damage level 5
CONIFERS (GENERAL)COLEOPTERA CurculionidaeHylobius abietis Linnaeus, 1758
Pine weevil
Gwiddonyn Pinwydd
Damage level 5
CONIFERS (GENERAL)HYMENOPTERA TorymidaeMegastigmus pinus Parfitt, 1857
Silver fir seed wasp
Gwenynen Feirch Hedyn y Ffynidwydden Arian
Damage level 5
CONIFERS (GENERAL)COLEOPTERA CurculionidaeOtiorhynchus singularis Linnaeus, 1767
Clay-coloured weevil
Gwiddonyn Clai Lliwiedig
Damage level 5
CONIFERS (GENERAL)COLEOPTERA ScolytidaeXyloterus lineatus Erichson, 1836
Conifer ambrosia beetle
Chwilen Conwydd Ambrosia
Damage level 5
DOUGLAS FIR (PSEUDOTSUGA)HEMIPTERA AdelgidaeAdelges cooleyi Gillette, 1907
Douglas fir woolly aphid
Llysleuen wlanog Ffynidwydden Douglas
Damage level 4
DOUGLAS FIR (PSEUDOTSUGA)HYMENOPTERA TorymidaeMegastigmus spermotrophus Wachtl,1893
Douglas fir seed wasp
Gwenynen Feirch Hedyn y Ffynidwydden Douglas
Damage level 5
ELM (ULMUS)COLEOPTERA ScolytidaeHylurgopinus rufipes Eichhoff, 1868
Native bark beetle
Chwilen Rhisgyl Brodor y Llwyfen
Damage level 5
ELM (ULMUS)COLEOPTERA ScolytidaeScolytus multistriatus Marsham, 1802
Small elm beetle
Chwilen Llwyfen Fach
Damage level 5
ELM (ULMUS)COLEOPTERA ScolytidaeScolytus scolytus Fabricius, 1775
Large elm beetle
Chwilen Llwyfen Fawr
Damage level 5
HORSE CHESTNUT (AESCULUS hippocastanum)LEPIDOPTERA GracillariidaeCameraria ohridella Desch & Dem., 1986
Horse Chestnut Leaf Miner moth
Lindys y Dail Castan y Meirch
Damage level 5
Exotic
LARCH (LARIX)HEMIPTERA AdelgidaeAdelges laricis Vallot, 1836
Larch woolly aphid
Llysleuen Llarwydden Wlanog
Damage level 4
LARCH (LARIX)HYMENOPTERA PamphiliidaeCephalcia lariciphila Wachtl., 1898
Web-spinning larch sawfly
Llifbryf Gwe Chwyrlio Llanwydden
Damage level 4
LARCH (LARIX)COLEOPTERA ScolytidaeIps cembrae Heer, 1836
Large larch bark beetle
Chwilen Rhisgyl Fawr y Llanwydden
Damage level 5
LARCH (LARIX)HYMENOPTERA TenthredinidaePristiphora erichsonii Hartig, 1837
Large larch sawfly
Llifbryf Llanwydden Fawr
Damage level 5
NURSERYLEPIDOPTERA NoctuidaeAgrotis exclamationis Linnaeus, 1758
Heart and dart moth
Gwyfyn Pen Saeth
Damage level 4
NURSERYLEPIDOPTERA NoctuidaeAgrotis segetum Denis & Schiffermüller, 1775
Turnip moth
Gwyfyn y maip;neu Gwyfryn yr Erfin
Damage level 4
NURSERYCOLEOPTERA CurculionidaeBarypeithes araneiformis Schrank, 1781
Strawberry fruit weevil
Gwiddonyn Ffrwyth y Mefusen
Damage level 5
NURSERYCOLEOPTERA CurculionidaeBarypeithes pellucidus Boheman, 1834
Short snouted weevil
Gwiddonyn Durynnog Byr
Damage level 5
NURSERYDIPTERA BibionidaeBibio spp. Geoffroy, 1762
St. Mark's fly
Gwybedyn Marc bongoch
Damage level 4
NURSERYCOLLEMBOLA SminthuridaeBourletiella hortensis Fitch, 1863
Garden spring-tail
Cwtsboncyn gardd
Damage level 5
NURSERYLEPIDOPTERA HepialidaeHepialus humuli Linnaeus, 1758
Ghost swift moth
Chwimwyfyn Rhithiol
Damage level 4
NURSERYCOLEOPTERA ScarabaidaeMelolontha melolontha Linnaeus, 1758
Cockchafer beetle
Chwilen y bwmp
Damage level 4
NURSERYHEMIPTERA AphididaeMyzus cerasi Fabricius, 1775
Cherry blackfly
Gwybedyn Du Ceiriosen
Damage level 4
NURSERYHYMENOPTERA CynipidaeNeuroterus quercusbaccarum Linné, 1758
Currant gall wasp
Gwenynen Chwydd Gronynnog
Damage level 4
NURSERYCOLEOPTERA CurculionidaeOtiorhynchus ovatus Linnaeus, 1758
Strawberry root weevil
Gwiddonyn Gwreiddyn Mefus
Damage level 5
NURSERYCOLEOPTERA CurculionidaeOtiorhynchus singularis Linnaeus, 1767
Clay-coloured weevil
Gwiddonyn Clai Lliwiedig
Damage level 4
NURSERYHEMIPTERA CallaphididaePhyllaphis fagi Linnaeus, 1767
Beech woolly aphid
Llysleuen Wlanog y Ffawydden
Damage level 4
NURSERYCOLEOPTERA ScarabaidaePhyllopertha horticola Linnaeus, 1758
Garden chafer
Chwilen Ardd
Damage level 4
NURSERYCOLEOPTERA ScarabaidaeSerica brunnea Linnaeus, 1758
Brown chafer
Chwilen Frown
Damage level 4
OAK (QUERCUS)LEPIDOPTERA TortricidaeCydia splendana Hübner, 1799
Acorn moth
Gwyfyn Mes
Damage level 4
OAK (QUERCUS)LEPIDOPTERA LymantridaeLymantria dispar Linnaeus, 1758
Gypsy moth
Gwyfof Gipsy
Damage level 4
OAK (QUERCUS)LEPIDOPTERA ThaumetopoeidaeThaumetopoea processionea Linnaeus, 1758
Oak Processionary moth
Gorymdeithiwr Gwyfyn y Dderwen
Damage level 4
PINE (PINUS)LEPIDOPTERA GeometridaeBupalus piniaria Linnaeus, 1758
Pine looper moth
Gwyfyn Binwydden ddolennog
Damage level 5
PINE (PINUS)COLEOPTERA ScolytidaeDendroctonus ponderosae Hopkins, 1902
Mountain pine beetle
Chwilen Pinwydden y Mynydd
Damage level 5
Exotic
PINE (PINUS)COLEOPTERA ScolytidaeDendroctonus valens LeConte, 1860
Red turpentine beetle
Chwilen Twrpant Coch
Damage level 5
Exotic
PINE (PINUS)LEPIDOPTERA LasiocampidaeDendrolimus pini Linnaeus, 1758
Pine-tree Lappet moth
Gwyfyn Llabedog y Pinwydd
Damage level 5 attempting eradication
Exotic
PINE (PINUS)COLEOPTERA ScolytidaeHylastes ater Erichson, 1836
Black pine beetle
Chwilen y Binwedden Ddu
Damage level 4
PINE (PINUS)LEPIDOPTERA LymantriidaeOrgyia antiqua Linnaeus, 1758
Vapourer moth
Gwyfyn Tuswog
Damage level 4
PINE (PINUS)LEPIDOPTERA NoctuidaePanolis flammea Denis & Schiffermüller, 1775
Pine beauty moth
Gwyfyn y Pinwydd
Damage level 5
PINE (PINUS)COLEOPTERA CurculionidaePissodes castaneus De Geer, 1775
Small banded pine weevil
Gwiddonyn Pinwydden y Rhesog Fach
Damage level 4
PINE (PINUS)LEPIDOPTERA TortricidaeZeiraphera diniana Guenée, 1845
Larch bud moth
Gwyfyn Glasu'r Llanwydden
Damage level 4
POPLAR (POPULUS)DIPTERA AgromyzidaeAgromyza sp. Fallén, 1823
Poplar cambium midge
Gwybed Poplysen Cambiwm
Damage level 5
POPLAR (POPULUS)HEMIPTERA PemphigidaePhloeomyzus passerini Signoret, 1875
Woolly poplar aphid
Llysleuen aethnen wlanog
Damage level 4
SPRUCE (PICEA)HEMIPTERA LachnidaeCinara pilicornis Hartig, 1841
Brown spruce shoot aphid
Llysleuen Blagur Sbriwsen Frown
Damage level 4
SPRUCE (PICEA)COLEOPTERA ScolytidaeDendroctonus micans Kugelann, 1794
Great spruce bark beetle
Chwilen Fawr Rhisgyl y Sbriwsen
Damage level 4
SPRUCE (PICEA)COLEOPTERA ScolytidaeDendroctonus rufipennis Kirby, 1837
Spruce beetle
Chwilen y Sbriwsen
Damage level 5
Exotic
SPRUCE (PICEA)HEMIPTERA AphididaeElatobium abietinum Walker, 1949
Green spruce aphid
Llysleuen Sbriwsen Wyrdd
Damage level 4
SPRUCE (PICEA)COLEOPTERA ScolytidaeHylastes cunicularius Erichson, 1836
Black spruce beetle
Chwilen y Sbriwsen Ddu
Damage level 5
SPRUCE (PICEA)COLEOPTERA ScolytidaeIps amitinus Eichhoff, 1872
Smaller 8-toothed spruce bark beetle
Chwilen Fach 8 Danheddog Rhisgyl y Sbriwsen
Damage level 5
SPRUCE (PICEA)COLEOPTERA ScolytidaeIps duplicatus Sahlberg, 1836
Northern bark beetle
Chwilen Rhisgyl y Gogledd
Damage level 5
Exotic
SPRUCE (PICEA)COLEOPTERA ScolytidaeIps typographus Linnaeus, 1758
8-toothed spruce bark beetle
Chwilen 8 Danheddog Rhisgyl y Sbriwsen
Damage level 5
Exotic
SPRUCE (PICEA)LEPIDOPTERA LymantriidaeOrgyia antiqua Linnaeus, 1758
Vapourer moth
Gwyfyn Tuswog
Damage level 4
SPRUCE (PICEA)COLEOPTERA CurculionidaePissodes strobi Peck, 1817
White pine weevil
Gwiddonyn Pinwydden Wen
Damage level 4
Exotic
SPRUCE (PICEA)LEPIDOPTERA TortricidaeZeiraphera diniana Guenée, 1845
Larch bud moth
Gwyfyn Glasu'r Llanwydden
Damage level 4
UNDER GLASSACARI TetranychidaeOligonychus ununguis Jacobi, 1905
Conifer spinning mite
Gwiddon Conwydden Nyddu
Damage level 4
UNDER GLASSCOLEOPTERA CurculionidaeOtiorhynchus sulcatus Fabricius, 1775
Black vine or Cyclamen weevil
Gwiddonyn Du y Winwydden
Damage level 5
UNDER GLASSDIPTERA MycetophilidaeSciarid spp. Johannsen, 1884
Fungus gnats
Gwybedyn y Fadarch
Damage level 5

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Using nature's weapons to battle current and future threats

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