Zeranol, a New Growth Drug, Is Reported by Penn
new growth-promoting hor
e, zeranol, is effective in in-
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THE ABOVE KAN-SUN DRYER AND BUTLER STORAGE BINS WERE RECENTLY
COMPLETED IN THE COUNTY.
THESE BINS IN OPERATION,
M. K. HOKE Est. Inc.
148 So. Main Street, Manheim, Pa.
creasing weight of lambs and
cattle raised under various man-
THE CAPACITY OF THESE BINS ARE AS FOLLOWS.
• 365 BU. PER HOUR CONTINUOUS FLOW DRYER
• 1000 BU. WET HOLDING BIN.
• 1000 BU. DRY LOAD OUT BIN.
• 15,000 BU. STORAGE BIN.
• ADDITIONAL 15,000 BU. STORAGE BIN ABOUT TO BE
CONSTRUCTED.
We have the experience to handle the complete job of
layout, design, assemble, and construction.
Our first class mechanics provide workmanship of the
highest quality satisfaction guaranteed.
agement systems, according to
experiments at Pennsylvania
State University. The findings
were reported recently at the
63rd annual meeting of the
American Society of Animal
Science.
In one trial, weaning weights
of steer calves were increased
by 25 pounds, according to Dr
Lowell L. Wilson, Penn State
professor of animal science. He
compared this with weight
gains of 19 pounds for similar
steer calves implanted with the
common hormone stilbestrol
All of these calves averaged 87
days of age when implanted
with the hormones.
The Penn State studies in
cluded 71 cattle and 122 lambs,
of different ages and exposed to
different types of management
Zeranol is one of several new
compounds with growth-promo
THEN LET US ESTIMATE ON YOUR REQUIREMENTS.
Phone 665-2266
Lancaster Farming, Saturday, August 28,1971
ting activities which has been
isolated from Gibberella Zeae,
a type of corn mold.
The studies involved implant
ing 36 milligrams of zeranol in
cattle and 12 milligrams in
sheep under the skin at the
base of the ear. Zeranol has lit
tle estrogenic or female hor
mone effects, as does stilbes
trol, used for many years to in
crease growth rate in cattle and
sheep.
In steers fed a post-weaning
ration of either 9.5, 11, or 12.5
per cent protein, zeranol im
planting increased rate of gain
by 7.8 per cent. Feed efficiency
was improved by about the
same percentage.
In trials conducted with
lambs, the use of the same
dietary protein levels resulted
in approximately the same re
sults with regard to increased
State
rate of gain from zeranol im
planting. However, zeranol did
tend to increase rate of gain
more within the 9.5 and 11 per
cent protein diets than within
the 12.5 per cent protein diets.
In an additional lamb feed
diet with an amino acid called
ing trial, supplementing the
methionine-hydroxy-analog was
studied in combination with
zeranol implanting The addi
tion of methionine to the diets
did not significantly increase
gain, although it did increase
feed efficiency. The addition of
the amino acid may have re
duced the acceptability of the
ration.
In another trail with zeranol,
rams, wethers, ewes and crypt
orchids( rams with testicles re
strained mechanically in the
body cavity) were implanted
with zeranol Implanting with
zeranol increased the average
daily gain of rams, cryptorchids,
wethers, and ewes by 10 9, 98,
12 5 and 7 9 per cent, respective
ly. This indicates that the use
of zeranol may be expected to
increase the rate of gain of
lambs of different sex types
In the latter trial the rams
and cryptorchids were marked
ly leaner than were the wethers
or ewes.
The use of zeranol had little
observable effects upon carcass
meatiness and quality.
Also involved in the research
were M. L. Borger, M. C. Rugh,
C. F. Orley, J. D. Sink and J H
Ziegler, all of the Department
of Animal Science at Penn
State.
Crops Will Be Shown
A record number of field crop
demonstration plots have been
established for the 1971 Agricul
tural Progress Days to be held
August 31, September 1-2 at the
Penn State Rock Springs Agri
culture Research Center.
Max Smith, Lancaster County
ag agent points out that those at
tending the field days may in
spect legume and grass varie
ties, forage crop management
,and rotation systems, corn hy
brids for gram and silage, no-till
corn planting, insect and weed
control plots, and commercial
grain sorghum.
The Rock Springs Agricultural
Research Center is located three
miles west of Pine Grove Mills
on Route 45.
9