Okigbo, R. and Ogbonnaya, U. 2009. Antifungal effects of two tropical plant leaf extracts (Ocimum gratissimum and Aframomum melegueta) on postharvest yam (Dioscorea spp.) rot. African Journal of Biotechnology. 5, 9 (May 2009). DOI:https://doi.org/10.4314/ajb.v5i9.42786.