Fenhexamid is primarily used as a fungicide in agriculture, especially in the control of Botrytis cinerea, commonly known as gray mold. It is highly effective in protecting fruits, vegetables, and ornamental crops, with significant use in vineyards for managing bunch rot in grapes. The compound works by inhibiting fungal sterol biosynthesis, specifically targeting the 3-ketoreductase enzyme, which disrupts cell membrane formation in the pathogen. It is often applied as a foliar spray during flowering and fruit development stages, providing both preventive and early curative action. Fenhexamid shows strong residual activity and performs well under cool, humid conditions where gray mold thrives. Due to its specific mode of action, it is considered a key tool in resistance management programs, typically rotated with fungicides from other chemical classes to prevent the development of resistant strains. The solution formulation allows for easy mixing and uniform coverage, making it suitable for use in both conventional and integrated pest management (IPM) systems. It has low toxicity to mammals and beneficial insects, supporting its use in sustainable farming practices.