Adaptation during northern range expansion in the elongate hemlock scale Fiorinia externa

Evan Preisser; Alexandra Lodge; David Orwig; Joseph Elkinton

Treesearch

Adaptation during northern range expansion in the elongate hemlock scale Fiorinia externa

Informally Refereed

Authors:

Evan Preisser, Alexandra Lodge, David Orwig, Joseph Elkinton

Year:

2007

Type:

General Technical Report - Proceedings

Station:

Northern Research Station

Source:

In: Gottschalk, Kurt W., ed. Proceedings, 17th U.S. Department of Agriculture interagency research forum on gypsy moth and other invasive species 2006; Gen. Tech. Rep. NRS-P-10. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 80.

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Abstract

The elongate hemlock scale Fiorinia externa, (EHS) an invasive pest from Japan, was first found in the eastern United States in 1908. It feeds on a variety of plants, most notably the eastern hemlock Tsuga canadensis, and has been spreading slowly into southern New England. In order to examine the northern spread of EHS and the possibility of local adaptation in this insect, we first performed a field survey in which we resurveyed 141 hemlock stands (first surveyed in 1997-98; see Orwig et al. 2002 for details) in a 7500 km? transect from southern Connecticut to northern Massachusetts.

Parent Publication

Proceedings, 17th U.S. Department of Agriculture interagency research forum on gypsy moth and other invasive species 2006

Citation

Preisser, Evan; Lodge, Alexandra; Orwig, David; Elkinton, Joseph. 2007. Adaptation during northern range expansion in the elongate hemlock scale Fiorinia externa. In: Gottschalk, Kurt W., ed. Proceedings, 17th U.S. Department of Agriculture interagency research forum on gypsy moth and other invasive species 2006; Gen. Tech. Rep. NRS-P-10. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northern Research Station: 80.