As you travel over your field with your herbicide this season, you may be considering adding a fungicide to that pass. If so, there are a few things to think about. In general, early fungicide applications on corn (V5-V7) have not been shown to provide much yield benefit over no treatment (average is +1 bushel per acre). In repeated trials across the country, we see the best opportunity for yield response with a treatment at tassel (average: +8 bushels per acre). However, there are some situations in which an early treatment may be more economical.