Hemlock Woolly Adelgid
USDA. FS. Northern Research Station.Select the non-indigenous forest pest to view maps depicting state and county distribution. Produced by: USDA, FS, Forest Health Protection, and its partners.
USDA. FS. Northeastern Area State and Private Forestry.Provides distribution maps and predicted future range expansion.
USDA. APHIS. Cooperative Agricultural Pest Survey. National Agricultural Pest Information System.
Google. YouTube; TheHemlockWoollyAdelgid.com
Google. YouTube; Harvard Forest, David A. Orwig.
The section below contains selected highly relevant resources for this species, organized by source. To view all related content for this species, click on "View all resources for species" in the top left of this page.
New York Invasive Species Clearinghouse.
State and Local Government
Wisconsin Department of Natural Resources.
Ohio Department of Agriculture. Plant Health.
Pennsylvania Department of Conservation and Natural Resources.
Maine Department of Conservation. Maine Forest Service. Forest Health and Monitoring Division.
- Annand, N.P. 1928. A contribution toward a monograph of the Adelginae (Phylloxeridae) of North America. Stanford, Calif.: Stanford University Press.
- Havill, N.P., M.E. Montgomery, G. Yu, S. Shiyake, and A. Caccone. 2006. Mitochondrial DNA from hemlock woolly adelgid (Hemiptera: Adelgidae) suggests cryptic speciation and pinpoints the source of the introduction to eastern North America. Annals of the Entomological Society of America 99(2):195-203.
- Orwig, D.A., D.R. Foster, and D.L. Mausel. 2003. Landscape patterns of hemlock decline in New England due to the introduced hemlock woolly adelgid. Journal of Biogeography 29(10-11):1475-1487.
- Wallace, M.S., and F.P. Hain. 2000. Field surveys and evaluation of native and established predators of the hemlock woolly adelgid (Homoptera: Adelgidae) in the southeastern United States. Proceedings: Symposium on Sustainable Management of Hemlock Ecosystems in Eastern North America. GTR-NE-267: 104-109.