1. Horticulture and Crop Science Dep.Cal Poly State Univ.San Luis ObispoCA93407
2. Dep. of Agronomy & HorticultureUniversity of Nebraska‐LincolnLincolnNE68583
3. Bayer Environmental ScienceDentonNE68339
4. Dep. of Horticulture, Forestry, and Recreation ResourcesKansas State Univ.ManhattanKS66506
5. Dep. of Plant PathologyKansas State Univ.ManhattanKS66506