-

The present study was conducted to determine susceptibility of some maize cultivars against corn smut (Ustilago maydis (DC) Corda.) under ecological conditions of Konya, Turkey. For these aims, field trials were established during the growing season in 2005. In the trials, reactions of 10-corn-variety against corn smut were investigated and was not determined any resistant cultivar of all the varieties used in the trials. However, it was established that 35P12, Monton, Bolson and TTM-815 varieties were found as middle resistant to U. maydis, whereas, both Falkner and Monzon varieties were very susceptible to the pathogen. In addition, yield losses from U. maydis varied from 26.4 % to 51.7 % in varieties used in the trials