1. Justus-Liebig-University Giessen, Institute for Insect Biotechnology; Giessen Germany
2. USDA/ARS, Center for Medical, Agricultural and Veterinary Entomology; Gainesville FL USA
3. Insect Pest Control Laboratory, Joint FAO/IAEA Programme of Nuclear Techniques in Food and Agriculture; Vienna Austria
4. Programa Moscafrut, SAGARPA-IICA; Metapa de Dominguez Chiapas Mexico