Northern Research Station

Title: Comparative impact of Scymnus ningshanensis and Pseudoscymnus tsugae (Coleoptera: Coccinellidae) on the hemlock woolly adelgid

Author: Butin, Elizabeth; Elkinton, Joseph; Havill, Nathan; Montgomery, Michael

Date: 2003

Source: In: Fosbroke, Sandra L.C.; Gottschalk, Kurt W., eds. Proceedings, U.S. Department of Agriculture interagency research forum on gypsy moth and other invasive species 2002; 2002 January 15-18; Annapolis, MD. Gen. Tech. Rep. NE-300. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station: 14.

Station ID: GTR-NE-300

Description: The hemlock woolly adelgid (Adelges tsugae Annand) is an introduced pest thought to be native to Asia. Damage to eastern hemlock and Carolina hemlock can be serious (Salom et al. 1996), but western and Asian hemlocks are seldom damaged. Potential biological control agents have been observed in Japan and China (Sasaji and McClure 1997, Yu et al. 2000). We compared two of these which have been previously imported, Scymnus ningshanensis Yu et Yao, a coccinellid from China (Yu et al. 2000) and Pseudoscymnus tsugae Sasaji & McClure a coccinellid from Japan (Sasaji and McClure 1997).

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Citation

Butin, Elizabeth; Elkinton, Joseph; Havill, Nathan; Montgomery, Michael  2003.  Comparative impact of Scymnus ningshanensis and Pseudoscymnus tsugae (Coleoptera: Coccinellidae) on the hemlock woolly adelgid.   In: Fosbroke, Sandra L.C.; Gottschalk, Kurt W., eds. Proceedings, U.S. Department of Agriculture interagency research forum on gypsy moth and other invasive species 2002; 2002 January 15-18; Annapolis, MD. Gen. Tech. Rep. NE-300. Newtown Square, PA: U.S. Department of Agriculture, Forest Service, Northeastern Research Station: 14..