Phosphites are chemical compounds that contain the phosphite ion, PO3^3-. They are often used in agriculture as fertilizers and fungicides, helping to promote plant growth and protect crops from diseases. Phosphites can enhance the immune response of plants, making them more resilient to various stresses. In addition to their agricultural uses, phosphites are also found in industrial applications, such as in the production of flame retardants and antioxidants. Their unique chemical properties make them valuable in various fields, including chemistry and materials science.