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