1. School of Plant and Environmental Sciences Virginia Polytechnic Institute and State University 675 Old Glade Road Blacksburg VA 24060 USA
2. Virginia Tech 418‐B Price Hall Blacksburg VA 24061 USA
3. Bayer U. S. – Crop Science Humboldt TN 38343 USA
4. Private Contractor Lincolnton NC 28092 USA
5. BASF Corporation Research Triangle Park NC 27709 USA