1. International Centre of Insect Physiology and Ecology (icipe), P.O. Box 30772, 00100 Nairobi, Kenya
2. Jomo Kenyatta University of Agriculture and Technology, Chemistry Department, P.O. Box 62000, 00200 Nairobi, Kenya
3. Department of Agricultural Research Services, Bvumbwe Research Station, P.O. Box 5748, Limbe, Malawi
4. Chemistry Research Unit, Center for Medical, Agricultural and Veterinary Entomology, Agricultural Research Service, U.S. Department of Agriculture, 1700 SW 23rd Drive, Gainesville, Florida 32608, United States