§ 186.4150 - Methoprene.

The feed additive methoprene (isopropyl (E,E)-11-methoxy-3,7,11-tri-methyl-2,4-do-decadienoate) may be safely used in accordance with the following prescribed conditions:

(a) It is used as a feed additive in the form of mineral and/or protein blocks or other feed supplements in the feed of cattle at the rate of 22.7 to 45.4 milligrams per 100 pounds of body weight per month.

(b) It is used to prevent the breeding of hornflies in the manure of treated cattle.

(c) To ensure safe use of the additive, the label and labeling of the pesticide formulation containing this additive shall conform to the label and labeling registered by the U.S. Environmental Protection Agency.

(d) Tolerances are established for residues of the insect growth regulator methoprene (isopropyl (E,E)-11-methoxy-3,7,11-trimethyl-2,4-dodecadienoate) in or on the following feed additive commodities:

FeedParts per millionCereal grain milled fractions (except flour and rice hulls)10Rice hulls25