Definition

Noun: * An insect (Adelges tsugae) that is a serious pest of hemlock trees. It feeds on the sap from the tree's twigs and branches, and the females secrete a white, waxy, wool-like substance to protect themselves and their eggs.

Usage

The term "woolly adelgid" is used to specifically identify this insect pest, primarily in the context of forestry, horticulture, and environmental science. It is often preceded by a species identifier, such as "hemlock woolly adelgid."

Examples

• The woolly adelgid has devastated hemlock populations across the eastern United States.
• Arborists are monitoring the forest for signs of the woolly adelgid.
• The tiny woolly adelgid is easily identified by the white, woolly ovisacs it produces on the underside of hemlock needles.

Advanced Usage

• The term is almost exclusively used in its compound form "hemlock woolly adelgid" (often abbreviated as HWA) to specify the species that attacks Eastern and Carolina hemlocks. Another species is the "balsam woolly adelgid."

Variants and Related Words

• Adelgid (noun): The common name for insects in the family Adelgidae, which are small, sap-sucking pests related to aphids.
• Hemlock woolly adelgid (noun): The full common name for .
• Balsam woolly adelgid (noun): A related species () that infests fir trees.

Synonyms

• Hemlock aphid (a less common but descriptive synonym, as adelgids are closely related to aphids).

Notes on Meaning

The definition focuses on the insect's biological identity and its destructive relationship with hemlock trees. The distinctive "woolly" appearance of its egg masses is its key identifying feature, as referenced in the provided context comparing them to "artificial snow."

Noun

1. an insect that feeds on hemlocks; its egg sacs are small fuzzy white balls like artificial snow on a Christmas tree