Experimental and producer-reported data quantify the value of foliar fungicide to winter wheat and its dependency on genotype and environment in the U.S. central Great Plains

•We quantified the yield benefits of fungicide to wheat using plot and survey data.•Fungicide yield benefits (7.8 ± 15 %) were greater in wetter growing seasons.•Susceptible genotypes benefited more from fungicides (17 %) than resistant ones (6 %).•Fungicides improved stability and modified environment-adaptability of genotypes.•Fungicide yield benefits were greater (31 %) in the survey data.