The role of silvicultural thinning in eastern forests threatened by hemlock woolly adelgid (Adelges tsugae)

Mary Ann Fajvan

Treesearch

The role of silvicultural thinning in eastern forests threatened by hemlock woolly adelgid (Adelges tsugae)

Informally Refereed

Authors:

Mary Ann Fajvan

Year:

2008

Type:

Other

Station:

Northern Research Station

Source:

In: Deal, R.L., tech. ed. Integrated restoration of forested ecosystems to achieve multiresource benefits: proceedings of the 2007 national silviculture workshop; 2007 May 7-10; Ketchikan, AK. Gen. Tech. Rep. PNW-733. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: 247-256.

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Abstract

In order to increase hemlock survivability in stands threatened by hemlock woolly adelgid (HWA), a new study is developing silvicultural thinning guidelines to reduce stand densities, reallocate resources, and increase hemlock vigor across a range of stand types and structures before HWA invasion. The 7 study areas are all geographically similar in that they regularly experience winter temperatures that can be lethal to hemlock woolly adelgid. The combined effects of climate and silvicultural treatment may serve to moderate adelgid populations and increase hemlock survival.

Keywords

hemlock woolly adelgid, silvicultural thinning, stocking, foliar nutrients

Citation

Fajvan, Mary Ann. 2008. The role of silvicultural thinning in eastern forests threatened by hemlock woolly adelgid (Adelges tsugae). In: Deal, R.L., tech. ed. Integrated restoration of forested ecosystems to achieve multiresource benefits: proceedings of the 2007 national silviculture workshop; 2007 May 7-10; Ketchikan, AK. Gen. Tech. Rep. PNW-733. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: 247-256.