woolly adelgid
noun
woolly adel·gid
-ə-ˈdel-jəd 
: either of two aphids (genus Adelges) with a white woolly coating that have been accidentally introduced into North America:
a
: one (A. piceae) native to Europe that is a serious pest of fir trees
b
: one (A. tsugae) native to Asia that is a serious pest of hemlocks
Examples of woolly adelgid in a Sentence
Recent Examples on the Web
This is the fifth time the balsam woolly adelgid has been found in the state since it was first detected in 2021.
—
Jalen Williams, Freep.com, 23 Apr. 2026
Through her inspections over the years, Turner has also intercepted species that haven't infiltrated Indiana yet, like hemlock woolly adelgid, an aggressive bug devastating North American hemlock trees in the eastern United States.
—Sophie Hartley, IndyStar, 25 Nov. 2025
Eventually scientists determined that a sap-sucking insect called the woolly adelgid was causing the trees to lose their needles.
—Robert Sullivan, Curbed, 9 June 2025
Be able to identify eastern hemlock trees and hemlock woolly adelgid.
—Nushrat Rahman, Detroit Free Press, 13 May 2024
Hemlock woolly adelgid threatens ecologically important hemlock trees Another invasive insect likely on its way to Wisconsin is the hemlock woolly adelgid.
—Claire Reid, Journal Sentinel, 2 Aug. 2023
Researchers simulated the arrival of the invasive Asian woolly adelgid bug by deliberately killing hemlock trees in 6.5 hectares of the forest.
—IEEE Spectrum, 26 Feb. 2015
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Jalen Williams, Freep.com, 23 Apr. 2026
Through her inspections over the years, Turner has also intercepted species that haven't infiltrated Indiana yet, like hemlock woolly adelgid, an aggressive bug devastating North American hemlock trees in the eastern United States.
—Sophie Hartley, IndyStar, 25 Nov. 2025
Eventually scientists determined that a sap-sucking insect called the woolly adelgid was causing the trees to lose their needles.
—Robert Sullivan, Curbed, 9 June 2025
Be able to identify eastern hemlock trees and hemlock woolly adelgid.
—Nushrat Rahman, Detroit Free Press, 13 May 2024
Hemlock woolly adelgid threatens ecologically important hemlock trees Another invasive insect likely on its way to Wisconsin is the hemlock woolly adelgid.
—Claire Reid, Journal Sentinel, 2 Aug. 2023
Researchers simulated the arrival of the invasive Asian woolly adelgid bug by deliberately killing hemlock trees in 6.5 hectares of the forest.
—IEEE Spectrum, 26 Feb. 2015
Cite this Entry
“Woolly adelgid.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/woolly%20adelgid. Accessed 9 Jun. 2026.
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