1 For: Biological Control Send Correspondence to: Dr. Vincent P. Jones Department of Entomology Tree Fruit Research and Extension Center Washington State University 1100 N. Western Ave. Wenatchee, WA 98801, USA 1-509-663-8181 x291 email: vpjones@wsu.edu Running head: Plant volatile lures for natural enemies Evaluating Plant Volatiles for Monitoring Natural Enemies in Apple, Pear and Walnut Orchards Vincent P. Jones a , David R. Horton b , Nicholas J. Mills c , Thomas R. Unruh b , Callie C. Baker a , Tawnee D. Melton a , Eugene Milickzy b , Shawn A. Steffan a , Peter W. Shearer d , Kaushalya G. Amarasekare d a Department of Entomology, Tree Fruit Research and Extension Center, Washington State University, 1100 N. Western Ave., Wenatchee, WA 98801, USA b USDA-ARS, Yakima Agricultural Research Laboratory, 5230 Konnowac Pass Road, Wapato, WA 98951, USA c Department of Environmental Science and Policy Management, University of California, Berkeley, CA 94720-3114, USA d Mid-Columbia Agricultural Research and Extension Center, Oregon State University, 3005 Experiment Station Drive, Hood River, OR 97031-9512, USA © 2015. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/