§ 558.185 - Coumaphos.

§ 558.185 Coumaphos.

(a) Specifications. Type A medicated articles containing 1.12, 2.0, 11.2, or 50 percent coumaphos.

(b) Sponsor. See No. 058198 in § 510.600(c) of this chapter.

(c) Related tolerances. See § 556.168 of this chapter.

(d) Special considerations.

(1) Labeling shall bear the following warning: The active ingredient coumaphos is a cholinesterase inhibitor. Do not use this product on animals simultaneously or within a few days before or after treatment with, or exposure to, cholinesterase-inhibiting drugs, pesticides, or chemicals.

(2) See § 500.25 of this chapter.

(e) Conditions of use in laying chickens.

Coumaphos in grams per ton	Indications for use	Limitations	Sponsor
(1) 27.2 (0.003 percent)	Laying chickens: For control of capillary worm (Capillaria obsignata) and as an aid in control of common round worm (Ascaridia galli) and cecal worm (Heterakis gallinae)	Feed continuously as the sole ration for 14 days. If reinfection occurs, treatment may be repeated, but not sooner than 3 weeks after the end of the previous treatment. Do not feed to chickens within 10 days of vaccination or other conditions of stress.	058198
(2) 36.3 (0.004 percent)	Replacement pullets: For control of capillary worm (Capillaria obsignata) and as an aid in control of common round worm (Ascaridia galli) and cecal worm (Heterakis gallinae)	Feed continuously as the sole ration for from 10 to 14 days. Do not feed to chickens under 8 weeks of age or within 10 days of vaccination or other conditions of stress. If birds are maintained on contaminated litter or exposed to infected birds, a second 10- to 14-day treatment is recommended, but not sooner than 3 weeks after the end of the previous treatment. If reinfection occurs after production begins, repeat treatment as recommended for laying flocks.	058198

[86 FR 14822, Mar. 19, 2021]