1. First and second authors: University of Idaho, Department of Entomology, Plant Pathology and Nematology, 875 Perimeter Drive, MS 2329, Moscow 83844-2329; and third author (G. R. Knudsen, deceased on 29 May 2016): University of Idaho, Department of Soil and Water Systems, 875 Perimeter Drive, MS 2340, Moscow 83844-2340.