1. Dickinson College, Department of Biology, Carlisle, Pennsylvania 17013, USA; E-mail: jason.smith@ful
2. World Vegetable Center, Eastern and Southern Africa, Duluti, Arusha, Tanzania; E-mail: thomas.dubois
3. National Herbarium of Tanzania, Tropical Pesticides Research Institute, Arusha, Tanzania; E-mail: ef
4. World Vegetable Center, Shanhua Tainan 74151, Taiwan, Republic of China; E-mail: srini.ramasamy@worl