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-keto reductase enzyme, which disrupts cell membrane formation in sensitive fungi. It is often applied as a foliar spray during flowering and fruit development stages, providing both preventive and early curative action. Fenhexamid shows good rainfastness and residual activity, making it suitable for use in humid or wet conditions where fungal pressure is high. Due to its specific mode of action, it is considered valuable in resistance management programs when rotated with fungicides from different chemical groups. The solution formulation allows for easy mixing and uniform coverage, enhancing its effectiveness in integrated pest management systems. It is particularly favored in sustainable and high-value crop production where quality and appearance are critical.