1. Center for the Study of Social Insects; UNESP - São Paulo State University; Rio Claro, SP Brazil
2. Department of Biochemistry and Microbiology; UNESP - São Paulo State University; Rio Claro, SP Brazil
3. Division of Microbial Resources, Center for Chemistry, Biological and Agricultural Research; CPQBA/UNICAMP; Paulínia, SP Brazil
4. Department of Vegetal Production; UNESP - São Paulo State University; Botucatu, SP Brazil