1. USDA-ARS Rice Research Unit, 1509 Aggie Drive, Beaumont, TX 77713. Mention of a trademark or proprietary product does not constitute a guarantee or warranty of a product by the U.S. Department of Agriculture, and does not imply its approval to the exclusion of other products that also can be suitable.
2. Corresponding author. E-mail address: c-bergman@tamu.edu
3. Texas A&M University, Research and Extension Center, Beaumont, TX 77713.