1. Department of Entomology, Soils, and Plant Sciences, 270 Poole Agricultural Center, Clemson University, Clemson, South Carolina 29634-0315, Lawrence Berkeley National Laboratory, Advanced Light Source, One Cyclotron Road, Berkeley, California 94720, United States Geological Survey, Water Resource Division, 345 Middlefield Road, MS 465, Menlo Park, California 94025, and Pacific Northwest Laboratory, Richland, Washington 99352