1. Embrapa Soja, 86001-970, Londrina, PR, Brazil
2. CRIA, Capitán Miranda, Paraguay
3. USDA/ARS, Foreign Disease-Weed Science Research Unit, 1301 Ditto Ave., Fort Detrick, MD 21702 USA
4. Embrapa Trigo, 99001-970, Passo Fundo, Brazil
5. USDA/ARS, Department of Crop Sciences, University of Illinois, Urbana-Champaign, IL, USA
6. CTPA, Goiania, GO, Brazil