Skip to Main Content
Chinese Coccinellidae for biological control of the hemlock woolly adelgid: description of native habitatAuthor(s): Michael E. Montgomery; Defu Yao; Hongbin Wang
Source: In: McManus, Katherine A.; Shields, Kathleen S.; Souto, Dennis R., eds. Proceedings: Symposium on sustainable management of hemlock ecosystems in eastern North America. Gen. Tech. Rep. NE-267. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 97-102.
Publication Series: General Technical Report (GTR)
Station: Northeastern Research Station
PDF: Download Publication (553.3 KB)
DescriptionThe hemlock woolly adelgid, Adelges tsugae Annand, is generally believed to be native to Asia and is known to occur in India, Japan, and China. In China, there are approximately four species of hemlock that grow in 14 provinces. We explored regions of the Southwestern Plateau in Yunnan, Sichuan, and Shaanxi Provinces for the adelgid and its natural enemies. The montane- forests of this region are largely in their natural state and noted for their biological diversity. We found the hemlock woolly adelgid in all three provinces and on each hemlock species examined (Tsuga dumosa (D. Don) Eichler, T. forrestii Downii, and T. chinensis (Franch.) Pritz.). More than 9 families of natural enemies were found in association with A. tsugae in China. One family, the Coccinellidae, is exceptionally diverse and seems to have an important role in maintaining the adelgid at low population densities. Of the 50+ species of lady beetles found on hemlock, at least 25 are new to science. Nine species are known to feed on HWA and three have been imported for further evaluation as biological control agents. The biodiversity of the lady beetles is discussed in relation to the habitat and climate of their native range compared with potential release sites in the United States.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, firstname.lastname@example.org if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMontgomery, Michael E.; Yao, Defu; Wang, Hongbin. 2000. Chinese Coccinellidae for biological control of the hemlock woolly adelgid: description of native habitat. In: McManus, Katherine A.; Shields, Kathleen S.; Souto, Dennis R., eds. Proceedings: Symposium on sustainable management of hemlock ecosystems in eastern North America. Gen. Tech. Rep. NE-267. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 97-102.
- An overview of lady beetles in relation to their potential as biological controls for hemlock woolly adelgid
- Effects of the removal of overstory hemlock from hemlock-dominated forests on eastern redback salamanders
- Impacts of hemlock decline and ecological considerations for hemlock stand restoration following hemlock woolly adelgid outbreaks
XML: View XML