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| Pests of Trees and Shrubs | ||||
| Alder spittlebug | Clastoptera obtusa | Lesser peachtree borer | Synanthedon pictipes | |
| Ambrosia beetle | Xylosandrus germanus | Lilac/ash borer | Podosesia syringae | |
| American hornet moth | Sesia tibialis | Linden borer | Saperda vestita | |
| Aphids | Family Aphididae | Locust borer | Megacyllene robiniae | |
| Apple bark borer | Synanthedon pyri | Maple bladdergall mite | Vasates quadripedes | |
| Arborvitae leafminer | Argyresthia thuiella | Maple callus borer | Synanthedon acerni | |
| Ash flower gall mite | Aceria fraxiniflora | Maple spindlegall mite | Vasates aceriscrumena | |
| Ash plant bug | Tropidosteptes amoenus | Maple velvet erineum gall mite | Aceria aceris | |
| Asian longhorned beetle | Anoplophora glabripennis | Mimosa webworm | Homadaula anisocentra | |
| Azalea lace bug | Stephanitis pyrioides | Mountainash sawfly | Pristiphora geniculata | |
| Bagworm | Thyridopteryx ephemeraeformis | Mourningcloak butterfly | Nymphalis antiopa | |
| Balsam twig aphid | Mindarus abietinus | Oak borer | Paranthrene simulans | |
| Banded ash clearwing | Podosesia aureocincta | Oak clearwing borer | Paranthrene asilipennis | |
| Birch lace bug | Corythuca pallipes | Oak cynipid galls | Family Cynipidae | |
| Birch leafminer | Fenusa pusilla | Obscure scale | Melanaspis obscura | |
| Black pineleaf scale | Nuculaspis californica | Oriental beetle | Exomala orientalis | |
| Black vine weevil | Otiorhynchus sulcatus | Oystershell scale | Lepidosaphes ulmi | |
| Boxelder bug | Boisea trivittatus | Pales weevil | Hylobius pales | |
| Boxwood spider mite | Eurytetranychus buxi | Peachtree borer | Synanthedon exitiosa | |
| Bronze birch borer | Agrilus anxius | Pear sawfly | Caliroa cerasi | |
| Brownheaded ash sawfly | Tomostethus multicinctus | Pin oak kermes | Allokermes galliformus | |
| Calico scale | Eulecanium cerasorum | Pine bark adelgid | Pineus strobi | |
| Cankerworms | Alsophila pometaria, Paleacrita vernata | Pine engraver | Ips pini | |
| Clearwing borers | Family Sesiidae | Pine needle scale | Chionaspis pinifoliae | |
| Clover mite | Bryobia praetiosa | Pine root collar weevil | Hylobius radicis | |
| Cooley spruce gall adelgid | Adelges cooleyi | Pine shoot beetle | Tomicus piniperda | |
| Cottonwood leaf beetle | Chrysomela scripta | Pine spittlebug | Aphrophora parallela | |
| Cottony maple scale | Pulvinaria innumerabilis | Pine thrips | Gnophothrips sp. | |
| Currant borer | Synanthedon tipuliformis | Pine tortoise scale | Toumeyella parvicornis | |
| Cyclamen mite | Phytonemus pallidus | Pitch mass borer | Synanthedon pini | |
| Dogwood borer | Synanthedon scitula | Planthoppers | Families Acanalonidae and Flatiidae | |
| Dogwood sawfly | Macremphytus tarsatus | Poplar and willow borer | Cryptorhynchus lapathi | |
| Dogwood spittlebug | Clastoptera proteus | Poplar clearwing borer | Paranthrene dollii | |
| Dusky birch sawfly | Croesus latitarsus | Poplar tentmaker | Clostera inclusa | |
| Dusky clearwing | Paranthrene tabaniformis | Pubescent leaf kermes | Nanokermes pubescens | |
| Eastern pine shoot borer | Eucosma gloriola | Raspberry crown borer | Pennisetia marginata | |
| Eastern spruce gall adelgid | Adelges abietis | Red maple borer | Synanthedon acerrubri | |
| Eastern tent caterpillar | Malacosoma americanum | Redheaded pine sawfly | Neodiprion lecontei | |
| Elm bark beetle, smaller European | Scolytus multistriatus | Redhumped caterpillar | Schizura concinna | |
| Hylurgopinus rufipes | Rhododendron borer | Synanthedon rhododendri | ||
| Elm borer | Saperda tridentata | Roundheaded appletree borer | Saperda candida | |
| Elm casebearer | Coleophora ulmifoliella | Saratoga spittle bug | Aphrophora saratogensis | |
| Elm eriophyid mite | Aceria parulmi | Sawflies | Family Diprionidae | |
| Pyrrhalta luteola | Scurfy scale | Chionaspis furfura | ||
| Elm scurfy scale | Chionaspis americana | Smaller spruce bud scale | Physokermes hemicryphus | |
| Emerald ash borer | Agrilus planipennis | Spittlebugs | Family Cercopidae | |
| Eriophyid mites | Family Eriophyidae | Spring cankerworm | Paleacrita vernata | |
| Euonymus scale | Unaspis euonymi | Spruce budworm | Choristoneura fumiferana | |
| European elm scale | Gossyparia spuria | Spruce spider mite | Oligonychus ununguis | |
| European fruit lecanium | Parthenolecanium corni | Strawberry root weevil | Otiorhynchus ovatus | |
| European pine sawfly | Neodiprion sertifer | Summer oak borer | Paranthrene pellucida | |
| European pine shoot moth | Rhyacionia buoliana | Sycamore lace bug | Corythucha ciliata | |
| European red mite | Panonychus ulmi | Treehoppers | Family Membracidae | |
| Fall cankerworm | Alsophila pometaria | Tuliptree aphid | Illinoia liriodendri | |
| Fall webworm | Hyphantria cunea | Tuliptree scale | Toumeyella liriodendri | |
| Flatheaded appletree borer | Chrysobothris femorata | Twig girdler | Oncideres cingulata | |
| Fletcher scale | Parthenolecanium fletcheri | Twig pruner | Anelaphus villosus | |
| Forest tent caterpillar | Malacosoma disstria | Twolined chestnut borer | Agrilus bilineatus | |
| Fourlined plant bug | Poecilocapsus lineatus | Twospotted spider mite | Tetranychus urticae | |
| Gloomy scale | Melanaspis tenebricosa | Uglynest caterpillar | Archips cerasivorana | |
| Gypsy moth | Lymantria dispar | Viburnum borer | Synanthedon viburni | |
| Hackberry nipple gall maker | Pachypsylla celtidismamma | Viburnum crown borer | Synanthedon fatifera | |
| Hemlock rust mite | Nalepella tsugifoliae | Walnut caterpillar | Datana integerrima | |
| Hemlock woolly adelgid | Adelges tsugae | White pine aphid | Cinara strobi | |
| Honeylocust plant bug | Diaphnocoris chlorionis | White pine sawfly | Neodiprion pinetum | |
| Honeylocust spider mite | Platytetranychus multidigituli | White pine weevil | Pissodes strobi | |
| Honeysuckle witches' broom aphid | Hyadaphis tataricae | Whitemarked tussock moth | Orgyia leucostigma | |
| Imported willow leaf beetle | Plagiodera versicolora | Whitespotted sawyer | Monochamus scutellatus | |
| Introduced pine sawfly | Diprion similis | Willow borer | Synanthedon proxima | |
| Jack pine sawfly | Neodiprion pratti banksianae | Woolly alder aphid | Paraprociphilus tessellatus | |
| Japanese beetle | Popillia japonica | Woolly apple aphid | Eriosoma lanigerum | |
| Juniper scale | Carulaspis juniperi | Yellowheaded spruce sawfly | Pikonema alaskensis | |
| Lace bugs | Family Tingidae | Yellownecked caterpillar | Datana ministra | |
| Leafhoppers | Family Cicadellidae | Zimmerman pine moth | Dioryctria zimmermani | |
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