Entry from US English dictionary
Any of several small aphidlike insects that feed on conifers, especially hemlocks, spruces, and firs. By sucking the sap from young twigs, the insect retards or prevents tree growth and causes needles to discolor and drop prematurely.
- Superfamily Aphidoidea, family Adelgidae
More definitions of woolly adelgidDefinition of woolly adelgid in: