1. Postdoctoral Research Associate, Irrigated Agriculture Research and Extension Center, Washington State Univ., Prosser, WA 99350 (corresponding author).
2. Extension Irrigation Engineer and Associate Scientist, Biological Systems Engineering Dept., Washington State Univ., Prosser, WA 99350.
3. Assistant Professor and Extension Specialist, School of Economics Sciences, Washington State Univ., 1100 N. Western Ave., Wenatchee, WA 98801.
4. Assistant Professor, Dept. of Economics and Management Sciences, Universidad Tecnologica de Bolivar, Cartagena de Indias, Colombia.
5. Postdoctoral Research Associate, Irrigated Agriculture Research and Extension Center, Washington State Univ., Prosser, WA 99350.
6. Professor and Entomologist, Entomology Dept., Washington State Univ., Prosser, WA 99350.