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Insects and mites

Insects and mites can damage the leaves, branches, roots, or stems of trees, either directly by feeding on these structures or indirectly by acting as vectors transmitting diseases. The damage can range from relatively minor issues, such as a negative affect on plant appearance, to more severe issues, including reduced tree growth and even tree death. Insects and mites, however, also play important ecological roles in forests by decomposing and recycling organic matter and nutrients, pollinating flowers, and serving as food sources for wildlife. Many insects and mites, acting as natural enemies (i.e., predators, parasitoids, or parasites) of pests, play a beneficial role in reducing pest populations. The study of insects is referred to as entomology, while the study of mites and ticks is called acarology. Insects and mites are classified according to a taxonomic system.

Index of common and scientific names of insects and mites

The insect or mite entries have sections containing nomenclature and taxonomy; general information and importance; distribution and hosts; symptoms and signs; life cycle; damage; prevention and management; selected references; and photographs of various life stages and damage.

Acalitus rudis (Canestrini)

Common name: Birch budgall mite

Acantholyda balanata (MacGillivray)

Common name: Greenstriped webspinning sawfly

Acantholyda erythrocephala (L.)

Common name: Pine false webworm

Acantholyda verticalis (Cresson)

Common name: Upright webspinning sawfly

Aceria elongatus (Hodgkiss)

Common name: Crimson erineum mite

Aceria parapopuli (Keif.)

Common name: Poplar bud gall mite

Acericecis ocellaris (Osten Sacken)

Common name: Ocellate gall midge

Acleris gloverana (Walsingham)

Common name: Western blackheaded budworm

Acleris variana (Fernald)

Common name: Eastern blackheaded budworm

Acossus centerensis [Lint.]

Common name: Poplar carpenterworm

Adelges abietis (Linnaeus)

Common name: Eastern spruce gall adelgid

Adelges cooleyi (Gillette)

Common name: Cooley spruce gall adelgid

  • Revision 2024

Adelges piceae (Ratzeburg)

Common name: Balsam woolly adelgid

Adelges tsugae Annand

Common name: Hemlock woolly adelgid

Agrilus anxius Gory

Common name: Bronze birch borer

  • Revision 2024

Agrilus bilineatus (Weber)

Common name: Twolined chestnut borer

Agrilus planipennis Fairmaire

Common name: Emerald ash borer

  • Revision 2024

Alsophila pometaria [Harris]

Common name: Fall cankerworm

Ambermarked birch leafminer

Scientific name: Profenusa thomsoni (Konow)

Ambrosia beetle

Scientific name: Gnathotrichus sulcatus (LeConte)

Amphibolips quercusinanis (Osten Sacken)

Common name: Large oakapple gall

Anatis mali (Say)

Common name: Eyespotted lady beetle

Anoplonyx laricivorus (Rohwer et Middleton)

Common name: Twolined larch sawfly

Anoplonyx luteipes (Cresson)

Common name: Threelined larch sawfly

Anoplonyx occidens Ross

Common name: Western larch sawfly

Aphids (plant lice)

Scientific name: Aphis sp.

Aphrophora cribrata (Wlk)

Common name: Pine spittlebug

Aproceros leucopoda Takeuchi

Common name: Elm zigzag sawfly

Arborvitae leafminer

Scientific name: Argyresthia thuiella (Packard)

Arborvitae weevil

Scientific name: Phyllobius intrusus Kono

Archips cerasivorana (Fitch)

Common name: Uglynest caterpillar

Arge pectoralis (Leach)

Common name: Birch sawfly

Argyresthia cupressella Walshingham

Common name: Cypress tip moth

Argyrotaenia citrana (Fernie)

Common name: Orange tortrix

Ashflower gall

Scientific name: Eriophyes fraxiniflora Felt

Asian longhorned beetle

Scientific name: Anoplophora glabripennis (Motschulsky)

  • Revision 2024

Aspen carpenterworm

Scientific name: Acossus populi (Walker)

Aspen serpentine leafminer

Scientific name: Phyllocnistis populiella Chambers

Aspen twoleaf tier

Scientific name: Enargia decolor (Walker)