1. Departmento de Agronomia, Universidade Estadual de Maringá, Maringá, Paraná, Brazil 87020-900
2. Mycotoxin Prevention and Applied Microbiology Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, US Department of Agriculture, Peoria, Illinois 61604-3999
3. Departmento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil