@INBOOK {JACKAI:1991b, title = {Evaluation of cowpea germplasm for insect pest resistance}, author = {Jackai, L. and Singh, S. }, year = {1991}, type = {Crop genetic resources of Africa, Vol. II, edited by N.Q. Ng, P. Perrino, F. Attere, and H. Zedan}, pages = {85--93}, publisher = {International Institute of Tropical Agriculture (IITA); IBPGR; UNEP; CNR}, address = {Italy; Ibadan, Nigeria}, }