520.905c—Fenbendazole paste.
(e) Conditions of use—
(1) Horses—
(A) For control of large strongyles (Strongylus edentatus, S. equinus, S. vulgaris ), small strongyles, pinworms (Oxyuris equi ), and ascarids (Parascaris equorum ): 2.3 mg per pound (/lb) of body weight, or for foals and weanlings (less than 18 months of age), 4.6 mg/lb of body weight. Retreatment at intervals of 6 to 8 weeks may be required.
(B)
For control of arteritis caused by the fourth-stage larvae of S. vulgaris: 4.6 mg/lb of body weight daily for 5 days. Treatment should be initiated in the spring and repeated in 6 months.
(C)
For treatment of encysted mucosal cyathostome (small strongyle) larvae including early third-stage (hypobiotic), late third-stage, and fourth-stage larvae: 4.6 mg/lb of body weight daily for 5 consecutive days.
(D)
Fenbendazole paste 10 percent may be used concomitantly with approved forms of trichlorfon for the indications provided in paragraph (e)(1)(i)(A) of this section and for treating infections of stomach bots as provided in § 520.2520.
(ii) Indications for use.
For the removal and control of lungworms (Dictyocaulus viviparus ), stomach worms (Haemonchus contortus, Ostertagia ostertagi, Trichostrongylus axei ), and intestinal worms (Bunostomum phlebotomum, Nematodirus helvetianus, Cooperia punctata, C. oncophora, Trichostrongylus colubriformis, and Oesophagostomum radiatum ).
(iii) Limitations.
Cattle must not be slaughtered within 8 days following last treatment. A withdrawal period has not been established for this product in preruminating calves. Do not use in calves to be processed for veal.