1. Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68503, U.S.A.
2. Center for Advanced Technology and Population Ecology Lab, Institute of Environmental Biology, Adam Mickiewicz University, Poznań, Uniwersytetu Poznańskiego 10, 61-614 Poznań, Poland
3. U.S. Department of Agriculture-Agricultural Research Service, University of Nebraska-Lincoln, Lincoln, NE 68583, U.S.A.
4. Department of Plant Pathology, University of Nebraska-Lincoln, Lincoln, NE 68583, U.S.A.