Biocontrol Science and Technology (2010) 20, 1069-1074

Abdul Hakeem, Jerome F. Grant, Paris L. Lambdin, David Buckley, Frank A. Hale, James R. Rhea, Gregory J. Wiggins and Glenn Taylor (2010)
Recovery of Sasajiscymnus tsugae, released against hemlock woolly adelgid, Adelges tsugae, in the southern Appalachians
Biocontrol Science and Technology 20 (10), 1069-1074
Abstract: Eastern hemlock in the Great Smoky Mountains National Park is currently threatened by the hemlock woolly adelgid, Adelges tsugae Annand (Hemiptera: Adelgidae). As part of a management plan against this invasive insect pest, about 350,000 adults of the predatory beetle Sasajiscymnus tsugae (Sasaji and McClure) (Coleoptera: Coccinellidae) were released at ca. 150 sites in the Park from 2002 to 2007. Of these adult release sites, 33 were sampled in 2008 and 2009 using beat-sheet sampling for 4 man-hours. Sasajiscymnus tsugae adults (n=78) and/or larvae (n=145) were recovered from seven sites (21.2% of the release sites sampled). Recovery of S. tsugae was significantly associated with older release sites, with the most beetles recovered from 2002 release sites. These results indicate that S. tsugae may require more time (i.e., 5-7 years) than anticipated for population densities to reach readily detectable levels in some areas.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Gregory J. Wiggins, Abdul (Hunzai) Hakeem, Paris Lambdin

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
classical biocontrol/new introduction

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Adelges tsugae	Hemlock (Tsuga)	U.S.A. (SE)
Sasajiscymnus tsugae (predator)	Adelges tsugae	Hemlock (Tsuga)	U.S.A. (SW)