This regulation establishes time-limited tolerances for combined residues of diflubenzuron and its metabolites p- chlorophenylurea and p-chloroaniline in or on alfalfa, forage and alfalfa, hay. This action is in response to EPA's granting of an emergency exemption under section 18 of the Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) authorizing use of the pesticide on alfalfa and mixed grass/alfalfa fields. This regulation establishes a maximum permissible level for residues of diflubenzuron and its metabolites p-chlorophenylurea and p-chloroaniline, in these food commodities. The time-limited tolerances expire and are revoked on December 31, 2011.