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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.

Hemithea aestivaria (Hubner)

Common name: Common emerald

Hemlock looper

Scientific name: Lambdina fiscellaria (Guenée)

Hemlock sawfly

Scientific name: Neodiprion tsugae Middleton

Hemlock woolly adelgid

Scientific name: Adelges tsugae Annand

Heterarthrus nemoratus (Fallen)

Common name: Late birch leaf edgeminer

Heterocampa guttivitta Walker

Common name: Saddled prominent

Hyalophora euryalis (Walker)

Common name: Ceanothus silk moth

Hylesinus californicus [Swaine]

Common name: Western ash bark beetle

Hylobius congener Dalla Torre, Schenkling and Marshall

Common name: Seedling debarking weevil

Hylobius pales (Herbst)

Common name: Pales weevil

Hylobius warreni Wood

Common name: Warren root collar weevil

Hylurgopinus rufipes (Eichhoff)

Common name: Native elm bark beetle

Hypagyrtis piniata (Pack.)

Common name: Pine measuringworm moth

Hyphantria cunea (Drury)

Common name: Fall webworm