This regulation establishes a tolerance for the combined residues of the insecticide/miticide avermectin B<INF>1</INF> (a mixture of avermectins containing greater than or equal to 80% avermectin B<INF>1a</INF> (5-O-demethyl avermectin A<INF>1</INF>) and less than or equal to 20% avermectin B<INF>1b</INF> (5-O-demethyl-25-de (1-methylpropyl)-25-(1-methylethyl) avermectin A<INF>1</INF>)), and its delta-8,9-isomer, in or on avocado at 0.020 ppm; food products in food handling establishments (other than those already covered by higher tolerances as a result of use on growing crops, and other than those already covered by tolerances on milk, meat, and meat byproducts) at 0.01 ppm; herbs, subgroup 19A (except chives) at 0.030 ppm; meat and meat byproducts of goat, hog, horse, poultry, and sheep at 0.02 ppm; mint at 0.010 ppm; plum at 0.010 ppm; plum, prune, dried at 0.025 ppm; vegetable, fruiting, group 8 at 0.020 ppm; and vegetable, leafy, except Brassica, group 4 at 0.10 ppm. These tolerances were requested under the Federal Food, Drug, and Cosmetic Act (FFDCA), as amended by the Food Quality Protection Act of 1996 (FQPA) in petitions filed by Syngenta Crop Protection, Inc. (formerly Novartis Crop Protection, Inc.), Interregional Research Project Number 4, and Whitmire Micro-Gen Research Laboratories, Inc.