Federal Register - October 20, 2021
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Source: Federal Register
lotter on DSK11XQN23PROD with RULES1
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Federal Register / Vol. 86, No. 200 / Wednesday, October 20, 2021 / Rules and Regulations
Chlortetracycline amount
Combination in grams/
ton
xxxviii 25 to 700 to provide 350 mg/head/day.
Lasalocid, 30 to 600
Pasture cattle slaughter, stocker, feeder cattle, beef replacement heifers under 700 pounds: For control of active infection of anaplasmosis caused by Anaplasma marginale susceptible to chlortetracycline; and for increased rate of weight gain.
xxxix 25 to 700 g/ton to provide 350 mg/head/
day.
Lasalocid, 30 to 600;
melengestrol acetate, 0.5 to 2 g/ton to provide 0.5 mg/head/day melengestrol acetate.
Replacement beef heifers on pasture under 700 pounds: For control of active infection of anaplasmosis caused by Anaplasma marginale susceptible to chlortetracycline, increased rate of weight gain, and suppression of estrus heat.
xl 25 to 2,800 to provide 350 mg/head/day.
Lasalocid, 30 to 181.8
Beef cattle weighing under 700
pounds: For control of active infection of anaplasmosis caused by Anaplasma marginale susceptible to chlortetracycline; and for the control of coccidiosis caused by Eimeria bovis and E. zuernii.
xli 25 to 2,80 g/ton to provide 350 mg/head/
day.
Lasalocid, 30 to 181.8;
melengestrol acetate, 0.25 to 2 g/ton to provide 0.25 to 0.5 mg/
head/day melengestrol acetate.
Growing beef heifers fed in confinement for slaughter under 700
pounds: For control of active infection of anaplasmosis caused by Anaplasma marginale susceptible to chlortetracycline, control of coccidiosis caused by Eimeria bovis and E. zuernii, increased rate of weight gain, improved feed efficiency, and suppression of estrus heat.
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Limitations Feed continuously on a hand-fed basis at a rate of 350 mg chlortetracycline and not less than 60
mg nor more than 300 mg lasalocid per head per day in at least 1 pound of feed. Daily lasalocid intakes in excess of 200
mg/head/day in pasture cattle have not been shown to be more effective than 200 mg lasalocid/head/
day. Do not allow horses or other equines access to feeds containing lasalocid. No withdrawal period is required. A withdrawal period has not been established for this product in pre-ruminating calves. Do not use in calves to be processed for veal. See 558.311d of this chapter. Lasalocid as provided by No. 054771 in 510.600c of this chapter.
The melengestrol acetate Type C
top-dress medicated feed must be top dressed onto or mixed at feeding with a Type C medicated feed containing 25 to 700 g/ton of chlortetracycline and 30 to 600 g/ton lasalocid to provide 350 mg chlortetracycline per head daily and not less than 60 mg or more than 300
mg lasalocid per head daily in at least 1 pound of feed. Do not exceed 24 days of feeding. See 558.311d of this chapter. Chlortetracycline, lasalocid, and melengestrol as provided by No.
054771 in 510.600c of this chapter.
Hand feed continuously at a rate of 350 mg chlortetracycline and 1 mg lasalocid per 2.2 lb. body weight daily to cattle with a maximum of 360 mg of lasalocid per head per day. Do not allow horses or other equines access to feeds containing lasalocid. No withdrawal period is required. A withdrawal period has not been established for this product in pre-ruminating calves. Do not use in calves to be processed for veal. See 558.311d of this chapter. Chlortetracycline and lasalocid as provided by No.
054771 in 510.600c of this chapter.
The melengestrol acetate Type C
top-dress medicated feed must be top dressed onto or mixed at feeding with a Type C medicated feed containing 25 to 2,800 g/ton of chlortetracycline and 30 to 181.8 g/
ton lasalocid to provide 350 mg chlortetracycline per head per day and 1 mg lasalocid per 2.2 lb. of body weight daily with a maximum of 360 mg lasalocid per head per day. See 558.311d of this chapter. Chlortetracycline, lasalocid, and melengestrol as provided by No. 054771 in 510.600c of this chapter.
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