Implants Available
Today, at least 22 brand name growth implants are available for feedlot cattle. That works out to nearly 500 possible implant combinations in a reimplant program and more than 10,000 possible combinations if three implants are given to long-fed cattle.
One helpful approach to developing am implant system is to categorize the currently available implants by active ingredient and relative potency. Implants within a category should give somewhat similar responses and the decision should be based on price, convenience, availability and general preference.
| INGREDIENTS | BRANDS |
| Medium Potency Estrogen or Estrogen-like Implants | |
| EB20/PROG200 (estradiol bensoate, 20 mg.; Progesterone, 200 mg) | Synovex-S; Component E-S |
| EB20/TEST200 (estradiol benzoate, 20 mg; Testosterone, 200 mg.) | Synovex-H; Component E-H |
| E 25.7 (estradiol, 25.7 mg.) | Compudose |
| E 43.9 (estradiol. 43.9 mg.) | Encore |
| Z72 (zeranol, 72 mg.) | Magnum |
| Lower Potency Estrogen or Estrogen-like Implants | |
| Z36 (zeranol, 36 mg) | Ralgro |
| EB10/PROG100 (estradiol benzoate, 10 mg.; Progesterone, 100 mg.) | Synovex-C; Component E-C |
| Androgen Implants | |
| TBA140 (trenbolone acetate, 140 mg.) | Finaplix-S; Component T-S |
| TBA200 (trenbolone acetate, 200 mg.) | Finaplix-H; Component T-H |
| Higher Potency Combination Implants | |
| E24/TBA120 (estradiol, 24 mg.; trenbolone acetate, 120 mg.) | Revalor-S; Component TE-S |
| E14/TBA140 (estradiol, 14 mg.; trenbolone acetate 140 mg.) | Revalor-H |
| E28/TBA200 (estradiol benzoate, 28 mg.; trenbolone acetate 200 mg.) | Synovex Plus |
| E20/TBA200 (estradiol, 20 mg.; trenbolone acetate, 200 mg.) | Revalor-200 |
| Lower Potency Combination Implants | |
| E8/TBA40 (estradiol, 8 mg.; trenbolone acetate, 40 mg.) | Revalor-G |
| E16/TBA80 (estradiol, 16 mg.; trenbolone acetate, 80 mg.) | Revalor-IS |
| E8/TBA80 (estradiol, 8 mg.; trenbolone acetate, 80 mg.) | Revalor-IH |
What if I sell my calves before harvest weight?
Calfhood implants can add 20 to 40 lbs. (3 to 5 percent) to weaning weights. Stocker cattle that are gaining over 1.5 lbs. per day will increase weight gain 8 to 18 percent or 15 to 40 lbs. during the grazing season. Cattle that have been implanted as calves or stockers may have a slightly lower response to feedlot implants than those that have not been implanted. Keep this rule of thumb in mind: The most important implant you give is the last one before you sell the cattle. In the feedlot that is the terminal implant. If you background calves, the implant used the last 80 to 120 days will give you the most return per dollar invested.
Page updated 7/16/01
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