@BOOK {UMEH:1991, title = {Natural biological control of African rice gall midge in Nigeria: IITA research guide, No. 37}, author = {Umeh, E. D. N. * and Joshi, R. C. and Ukwungwu, M. N. *}, series = {IITA research guide, No. 37}, year = {1991}, publisher = {International Institute of Tropical Agriculture (IITA)}, address = {Ibadan, Nigeria}, note = {13p.}, }