This regulation extends a time-limited tolerance for the combined residues of the insecticide and miticide avermectin [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 celeriac at 0.05 parts per million (ppm) for an additional 2-year period. This tolerance will expire and is revoked on December 31, 2002. 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 celeriac. Section 408(l)(6) of 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 under section 18 of FIFRA.