To assess the resistance risk of Fusariumgraminearum to fludioxonil in the laboratory,17 UV-induced mutants resistant to fludioxonil were obtained.The resistance,stability and biological characteristics of the mutants were studied.Cross-resistance of the mutants to fludioxonil,tebuconazole,difenoconazole and azoxystrobin was tested.The results showed that EC50 values of the mutants to fludioxonil ranged from72.78μg/mL to 290.09μg/mL and the ratio of EC50 values of mutants resistant to fludioxonil,compared w...