Section 520.1120b - Haloxon boluses(a)Specifications. Each bolus contains 10.1 grams of haloxon.(b)Sponsor. See No. 000061 in § 510.600(c) of this chapter.(c)Related tolerances. See § 556.310 of this chapter.(d)Conditions of use in cattle - (1)Amount. Administered one bolus per 500 pounds body weight (35 to 50 milligrams per kilogram of body weight). Retreat in 3 to 4 weeks.(2)Indications for use. For control of gastrointestinal roundworms of the genera Haemonchus, Ostertagia,Trichostrongylus, and Cooperia.(3)Limitations. Do not treat dairy animals of breeding age or older. Do not treat within 1 week of slaughter.40 FR 13838, Mar. 27, 1975, as amended at 44 FR 61591, Oct. 29, 1979; 46 FR 48642, Oct. 2, 1981; 61 FR 8873, Mar. 6, 1996; 62 FR 61625, Nov. 19, 1997; 78 FR 28822, May 20, 2014