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Federal Register / Vol. 86, No. 200 / Wednesday, October 20, 2021 / Rules and Regulations Chlortetracycline amount
Combination in grams/
ton
Indications for use
Limitations
xxxiv 25 to 100 g/ton to provide 350 mg/head/
day.

Lasalocid, 10 to 30

Cattle under 700 pounds fed in confinement for slaughter: For control of active infection of anaplasmosis caused by Anaplasma marginale susceptible to chlortetracycline;
and for improved feed efficiency.

xxxv 25 to 100 g/ton to provide 350 mg/head/
day.

Lasalocid, 10 to 30

Cattle fed in confinement for slaughter: For control of bacterial pneumonia associated with shipping fever complex caused by Pasteurella multocida organisms susceptible to chlortetracycline;
and for improved feed efficiency.

xxxvi 25 to 700 to provide 350 g/head/day.

Lasalocid, 30 to 600

Pasture cattle slaughter, stocker, feeder cattle, dairy and beef replacement heifers: For control of bacterial pneumonia associated with shipping fever complex caused by Pasteurella multocida organisms susceptible to chlortetracycline; and for increased rate of weight gain.

xxxvii 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:
For control of bacterial pneumonia associated with shipping fever complex caused by Pasteurella spp. susceptible to chlortetracycline, increased rate of weight gain, and suppression of estrus heat.

Feed continuously in complete feed at a rate of 350 mg chlortetracycline and not less than 100 mg nor more than 360 mg lasalocid per head daily. 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.
Feed continuously in complete feed at a rate of 350 mg chlortetracycline and not less than 100 mg nor more than 360 mg lasalocid per head daily. 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.
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.

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