@ARTICLE {EMECHEBE:2004, title = {Farmer perception of the Striga problem and its control in northern Nigeria}, author = {Emechebe, A. and Ellis-Jones, J. and Schulz, S. and Douthwaite, B. and Kureh, I. * and Tarawali, G. and Kormawa, P. }, journal = {Experimental Agriculture}, year = {2004}, volume = {40}, pages = {215--232}, }