This regulation extends or re-establishes time-limited tolerances for residues of the pesticides fluridone in or on cotton undelinted seed, and diflubenzuron in or on alfalfa forage and hay. These actions are in response to EPA's granting of emergency exemptions under the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) authorizing use of these pesticides. In addition, the Federal Food, Drug, and Cosmetic Act (FFDCA) requires EPA to establish a time-limited tolerance or exemption from the requirement for a tolerance for pesticide chemical residues in food that will result from the use of a pesticide under an emergency exemption granted by EPA.