@INBOOK {EMECHEBE:1991, title = {Cowpea-striga problems and research in Nigeria}, author = {Emechebe, A. and Singh, B. and Leleji, O. I. and Atokple, I. * and Adu, J. K. }, year = {1991}, type = {Combating striga in Africa, edited by S.K. Kim}, pages = {18--28}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, }