This regulation establishes a time-limited tolerance for residues of spinosad in or on onion, dry bulb. 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 onion, dry bulb. This regulation establishes a maximum permissible level for residues of spinosad in this food commodity. The tolerance will expire and is revoked on December 31, 2006.