1. Horticulture Division, CSIR-Crops Research Institute, Kumasi, Ghana
2. Scientific Support Group, CSIR-Savannah Agricultural Research Institute, Nyankpala, Ghana
3. Plant Breeding Division, Cocoa Research Institute, New Tafo-Akim, Ghana
4. Soil Microbiology Division, CSIR-Soil Research Institute, Kumasi, Ghana
5. Allium Vegetable Research Institute National Institute of Horticulture and Herbal Science, Vegetable Research Institute, Muan-gun, Republic of Korea