@ARTICLE {ONYEKA:2005b, title = {Field evaluation of root rot disease and relationship between disease severity and yield in cassava}, author = {Onyeka, T. and Dixon, A. and Ekpo, E. *}, journal = {Experimental Agriculture}, year = {2005}, volume = {41}, number = {3}, pages = {357--363}, note = {RTB; Root and Tuber; Cassava}, }