1. Faculty of Natural and Agricultural Sciences, Postgraduate School of Agriculture and Rural Economics, University of Pretoria, Private Bag X20, 0028 Hatfield, South Africa.
2. International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), BP E5118 Bamako, Mali.
3. International Centre of Insect Physiology and Ecology (icipe), Duduville Campus P.O. Box 30772, 00100 Nairobi, Kenya.
4. Institute of Applied Ecology (IAE), Fujian Agriculture and Forestry University (FAFU) Jinshan, No.15 Shang Xia Dian Road, Fuzhou, China P.R.