§ 558.254. Famphur.
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/us/cfr/t21/s§ 558.254·A research copy — for the controlling text, always check the official state or federal source. Not legal advice.
(a)Specifications. Type A medicated articles containing 13.2 or 33.3 percent famphur.
(b)Sponsor. See No. 000061 in § 510.600(c) of this chapter.
(c)Related tolerances. See § 556.273 of this chapter.
(d)Special considerations. Famphur is a cholinesterase inhibitor. Do not use this product in animals simultaneously or within a few days before or after treatment with or exposure to cholinesterase-inhibiting drugs, pesticides, or chemicals.
(e)Conditions of use. It is used in cattle feed as follows: Famphur amount Indications for use Limitations Sponsor
(1)To provide 1.1 milligrams per pound (mg/lb) body weight per dayBeef cattle and nonlactating dairy cattle: For control of grubs and as an aid in control of sucking liceFeed for 30 days. Withdraw from dry dairy cows and heifers 21 days prior to freshening. Withdraw 4 days prior to slaughter000061
(2)To provide 2.3 mg/lb body weight per dayBeef cattle and nonlactating dairy cattle: For control of grubsFeed for 10 days. Withdraw from dry dairy cows and heifers 21 days prior to freshening. Withdraw 4 days prior to slaughter000061 [84 FR 39185, Aug. 9, 2019, as amended at 87 FR 17947, Mar. 29, 2022]
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§ 558.254
Famphur.
Fed. Reg.×2
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