1. Department of Applied and Technical Biology, Technical University of Kenya, P.O Box 52428–00200, Nairobi, Kenya
2. School of Biological Sciences, University of Nairobi, P.O Box 30197–00100, Nairobi, Kenya
3. Kenya Agricultural Research and Livestock Organization, Kabete, P.O Box 14733-00800, Nairobi, Kenya
4. Flamingo Horticulture (K) Limited (Dudutech), P.O BOX 1927–20117, Naivasha, Kenya