(S,S)-Valifenalate is primarily used as a fungicide in agriculture to protect crops from fungal diseases. It is particularly effective against oomycetes, such as those causing downy mildew in grapes, vegetables, and other high-value crops. The compound works by inhibiting the growth and reproduction of the fungi, thereby preventing the spread of infection and ensuring healthier plant yields. Its application is often favored for its targeted action and reduced environmental impact compared to broader-spectrum fungicides. Farmers typically apply it as a foliar spray, ensuring thorough coverage of the plant surfaces for optimal protection. Additionally, its use supports integrated pest management strategies, helping to maintain sustainable agricultural practices.