This regulation establishes tolerances for residues of quinoxyfen in or on commodities: lettuce, head and lettuce, leaf; melon, subgroup 9A; pepper, bell and pepper, nonbell; and strawberry. The Interregional Research Project Number 4 (IR-4) requested these tolerances under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA).