Tom J. Bechman STOP DISEASE: The goal is to arrest symptoms of diseases like southern rust with a fungicide. How and when you apply the fungicide affects your ROI. Corn Illustrated: Select the right product and tweak the application process to boost yield response. Suggested Event Jun 15, 2021 to Jun 17, 2021 You know fungicides return more dollars per acre on your investment if there is significant disease pressure, especially with susceptible hybrids. Jason Gahimer, manager of Beck’s Practical Farm Research, says there are other ways to increase the likelihood of a higher yield response and better return on investment when applying fungicides.