@INBOOK {EMECHEBE:1997a, title = {Technology options and research challenges to increase cowpea production under Striga and drought stress in semi-arid Africa}, author = {Emechebe, A. and Singh, B. }, editor = {Bezuneh, T. and Emechebe, A. and Sedgo, J. and Ouedraogo, M. }, year = {1997}, type = {Technology options for sustainable agricultural production in sub-Saharan Africa}, pages = {207--217}, publisher = {OAU/STRC-SAFGRAD}, address = {Ouagadougou, Burkina Faso}, note = {IITA Technologies}, }