@ARTICLE {OLANYA:1993a, title = {Incidence and geographical distribution of downy mildew on maize caused by Peronosclerospora sorghi in Nigeria}, author = {Olanya, O. and Fajemisin, J. and Oyekan, P. }, journal = {International Journal of Pest Management}, year = {1993}, volume = {39}, number = {1}, pages = {28--34}, }