1. National Horticultural Research Institute, Jericho Reservation Area, Idi-Ishin, Ibadan, Nigeria
2. College of Geographical Science, Fujian Normal University, Fuzhou, People’s Republic of China
3. Department of Crop Protection, University of Ilorin, Ilorin, Nigeria
4. Virology and Molecular Diagnostics Unit, International Institute of Tropical Agriculture, Ibadan, Nigeria