Hemlock woolly adelgid.
Contributors: United States. State and Private Forestry. Northeastern Area.
Series: Pest alert
Publisher: U.S. Dept. of Agriculture, Forest Service, Northeastern Area
Published: 1991
Place of publication: Durham, NH (USDA Forest Service, P.O. Box 640, Durham 03824)
Language: eng
Subjects: Eastern hemlock -- Diseases and pests.
Notes: Distributed to depository libraries in microfiche.

"NA-PR-06-91."