This was primarily a promotional project with the main purposes of a) evaluating crop protection practices (based on current practices, local technical knowledge and the outputs from previous projects) for clean seed yam production for applicability and economic efficacy in Kogi and Ekiti states of Nigeria, and b) developing dissemination outputs related to clean seed yam production which would lead to improved seed yam health and availability through promotion within Nigeria initially, but would also be suitable for wider application across the yam-growing belt of West Africa.