Fosetyl-aluminum is widely used as a fungicide in agriculture to protect crops from various fungal diseases. It is particularly effective against diseases caused by oomycetes, such as downy mildew, Phytophthora, and Pythium species. The chemical is applied to a range of crops, including fruits, vegetables, ornamentals, and turf, to prevent and control infections. It works by enhancing the plant's natural defense mechanisms, making it more resistant to fungal attacks. Fosetyl-aluminum is often applied as a foliar spray or soil drench, depending on the target disease and crop. Its systemic nature allows it to move within the plant, providing protection to both treated and untreated parts. This makes it a valuable tool for integrated pest management programs, helping to ensure healthy crop yields and reduce losses due to fungal infections.