Growth promoting implants have been used extensively in beef production for over 30 years. There are more than 27 brands of approved growth implants available.
With the proper development and implementation of an implant strategy, daily gains could improve up to 20%.
Cattle must have adequate nutrition before implants can positively influence feed efficiency and gain. The greatest response to implants tends to be observed in older cattle, such as yearlings, near peak periods of lean tissue deposition. Typically these would be yearling cattle consuming high levels of high energy feed.
The response to implanting suckling calves varies, based on genetics, quantity and quality of milk and feedstuffs, animal health, level of internal parasitism, and year. On the average, implanting suckling calves will increase weaning weight by 10 to 20 pounds. Caution must be used in implanting animals intended for future breeding.
There are no approved implants for use in bulls intended for future breeding; Synovex-C and Ralgro have been approved for one-time use in heifers intended for future breeding, after 45 days of age/less than 400 lbs. body weight. Re-implanting suckling calves intended for feed-out after 70-120 days (depending on the implant used) may improve average daily gain over a single implant.
The use of implants on suckling calves may affect (reduce) the response to subsequent implants and even carcass parameters, if the nutrition and implant program are not planned correctly.The growth promoting implants approved for use in the United States are extremely safe. They are safe not only for the cattle, but for producers who use the products and for the consumers who consume the beef produced from implanted cattle. There is no withdrawal time for any of the approved implants available in the United States.
Implants are placed under the skin on the posterior aspect of the ear by means of special implant application devices. Regardless of product and program chosen, the proper implant procedure and the cleanliness of the implant process are critical.
Implant Brands
FINAPLIX® H and Component T-H contain 200 mg of trenbolone acetate. Trenbolone acetate (TBA) appears to have a different mode of action than estrogen in promoting muscle deposition and this response is additive when used with an estrogenic implant.
This products contain estradiol benzoate (72% estradiol) and progesterone. Synovex-C is recommended for use in suckling beef calves weighing up to approximately 400 lbs. Synovex may be used in both steer and heifer calves, including one time on beef heifers intended for breeding later.
Contains estradiol benzoate (72% estradiol) and testosterone propionate. Synovex is recommended for use in heifers weighing 400 lbs. or more. When properly administered, these implants can help increase rate of weight gain and improve feed efficiency.
SYNOVEX®-S These products contain estradiol benzoate (72% estradiol) and progesterone. They are recommended for use in steers weighing 400 lbs. or more. When properly administered, these implants can help increase rate of weight gain and improve feed efficiency.
SYNOVEX® - PLUS contains higher levels of TBA than Revalor - S. This makes it a more potent implant, but as a result of its potency it can also be a more difficult implant to manage.
SYNOVEX® - CHOICE is approved for use in steers and contains both estradiol benzoate and trenbolone acetate at half the levels of Synovex Plus
RALGRO® - Zeranol, the active drug in RALGRO®, is a chemical derivative of a resorcylic acid lactone fermentation product, having estrogenic properties. Ralgro is used to increase the rate of weight gain and improve feed conservation in growing cattle, feedlot heifers, feedlot steers, weaned calves and suckling calves. Ralgro has been approved for use in beef heifers intended for breeding later. Magnum is a feedlot implant with the same active ingredient at double the dosage and it uses an implant gun that is similar to the gun for Ralgro.
Hormone growth implants
also increase the efficiency of beef production. This allows improves overall
quality and healthfulness of beef by reducing the amount of fat, while reducing
energy, feed usage and environmental impacts.
The increased efficiency
implants offer saves U.S. families hundreds of dollars each year by
lowering the cost of retail beef by 20 cents to 30 cents per pound.
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