Affiliation: | (1) Insect Biocontrol Laboratory, ARS-USDA, Bldg 011-A, Barc-West, 20705 Beltsville, Maryland, USA;(2) Bee Research Laboratory, ARS-USDA, Bldg 476, Barc-East, 20705 Beltsville, Maryland, USA;(3) Present address: Depto de Genetica e Evolucao, Universidade Estadual de Campinas, IB-UNICAMP, Brasil |