1. Dep. of Agronomy and HorticultureUniv. of Nebraska Lincoln NE 68583
2. USDA‐ARS and Dep. of Agronomy and HorticultureUniv. of Nebraska Lincoln NE 68583
3. USDA‐ARS and Dep. of Plant PathologyUniv. of Minnesota St. Paul MN 55108
4. Dep. of Plant PathologyUniv. of Nebraska Lincoln NE 68583
5. USDA‐ARS and Dep. of EntomologyKansas State Univ. Manhattan KS 66506