List of sample sites, number of dead trees, and detection of overwintering Halyomorpha halys in the dead trees.

1AFRS refers to the research farm of the USDA-ARS, Appalachian Fruit Research Station in Kearneysville, WV; KV refers to the research farm at the University of Maryland Research Station in Keedysville, MD; AT refers to the Appalachian Trail, MD. CFSP refers to the Cunningham Falls State Park, MD.2n/a indicates that sample sites were located in continuous mountainous areas.3Asterisk indicates that only standing trees were destructively sampled.