When crop hail damage occurred in the past, farmers could either replant or see if crops would grow out of the damage, depending on extent and timing of hail. However, there have been significant changes in production practices for corn and soybean, especially concerning fungicide use and the labeling of fungicides for the mitigation of plant stress such as hail injury.
Iowa State University
Sisson, Adam J. and Mueller, Daren S., "Hail and Fungicides Update 2013" (2013). Integrated Crop Management News. 46.