1. Behavioural and Chemical Ecology Unit, International Centre of Insect Physiology and Ecology (ICIPE), Post Office Box 30772, 00100 Nairobi, Kenya
2. Department of Horticulture, Jomo Kenyatta University of Agriculture and Technology, Post Office Box 62000, 00200 Nairobi, Kenya
3. Chemistry Research Unit, Center for Medical, Agricultural and Veterinary Entomology, Agricultural Research Service (ARS), United States Department of Agriculture (USDA), 1700 Southwest 23rd Drive, Gainesville, Florida 32608, United States