@ARTICLE {AKEM:1993, title = {Comparison of field screening methods to evaluate soybean cultivars for resitance to frogeye leaf spot}, author = {Akem, C. and Dashiell, K. and Emechebe, A. }, journal = {Journal of Plant Protection in the Tropics}, year = {1993}, volume = {9}, number = {3}, pages = {195--199}, }