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58000

Federal Register / Vol. 86, No. 200 / Wednesday, October 20, 2021 / Rules and Regulations Combination in grams/
ton
Indications for use
Limitations
iii to provide 0.5 mg/lb of body weight daily.

Beef cattle over 700 lb: For control of active infection of anaplasmosis caused by Anaplasma marginale susceptible to chlortetracycline.

iv 33.33 to 50 g/ton to provide 0.5 mg/lb of body weight per day.

Melengestrol acetate, 0.5 to 2 g/ton to provide 0.5 mg melengestrol acetate per head per day.

Replacement beef heifers over 700
lb: For control of active infection of anaplasmosis caused by Anaplasma marginale susceptible to chlortetracycline and for suppression of estrus heat.

v 25 to 1,100 g/ton to provide 0.5 mg/lb of body weight daily.

Lasalocid, 30 to 600

Pasture cattle slaughter, stocker, feeder cattle, beef replacement heifers over 700 pounds: For control of active infection of anaplasmosis caused by Anaplasma marginale susceptible to chlortetracycline; and for increased rate of weight gain.

vi 25 to 1,100 g/ton to provide 0.5 mg/lb of body weight daily.

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 over 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.

vii to provide 0.5 to 2.0
mg/lb of body weight daily.

Beef cattle and nonlactating dairy cattle: As an aid in the control of active infection of anaplasmosis caused by Anaplasma marginale susceptible to chlortetracycline.

Feed to provide chlortetracycline at the rate of 0.5 mg per pound of body weight daily in beef cattle under 700 pounds. Withdraw 48
hours prior to slaughter. To sponsor Nos. 054771 and 069254: Zero withdrawal time.
Melengestrol acetate Type C topdress medicated feed must be top dressed onto or mixed at feeding with a Type C medicated feed containing 33.33 to 50 g/ton chlortetracycline. Feeding a Type C topdress medicated feed containing melengestrol acetate shall not exceed 24 days. Chlortetracycline and melengestrol as provided by No. 054771 in 510.600c of this chapter.
Feed continuously on a hand-fed basis 0.5 mg chlortetracycline per lb. body weight per day and not less than 60 mg or more than 300
mg lasalocid per head daily 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 1,100 g/ton of chlortetracycline and 30 to 600 g/
ton lasalocid to provide 0.5 mg chlortetracycline per lb body weight per day and not less than 60 mg or more than 300 mg lasalocid per head per day 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.
In free-choice cattle feeds such as feed blocks or salt-mineral mixes manufactured from approved Type A articles. See paragraph d4 of this section.

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