14—Lancaster Farming, Friday, May 30, 1958
New Systemic Insecticide Proves
Effective in External Spray
A new systemic insecticide,
Eajer 21/199, has proved effec
tive as an external spray in con
trolling grubs m cattle and screw
worms in cattle and sheep, USDA
icscach has shown This chemical
proved much less effective as an
oral medication
Bayer 21/199 is an organic
phosphorus compound that works
systeniically—is absorbed through
the skin, translocated to tissues
contamng grubs If the spray is
applied several weeks before the
grubs normally appear in the
back, it prevents further develop
ment of the larvae It kills screw
wom larvae mostly on contact.
The sprays were tested both as
emulsions and as suspensions of
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Orders and to Custom
Sprayers
SMOKETOWN, PA.
Ph. Lane. EX 22639
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A. B. C. Groff
Neu Holland
F. H. Shotzherger
Elm
H. S. Newcomer & Sou A. L. Herr & Bro.
Mt. Jo> Quarryvllle
Allen H. Matz
Demer
the chemcal The former were
more ecective in controlling the
cattle grub but both were equal
ly effectve treatments for the
screwworm
Against cattle grubs—-larvae of
the heelworm fly—the Bayer 21/
199 sprays prevented grubs from
appearing in the backs of most
tested cattle. The only exceptions
were two animals that received
were two animals that received a
low concentration of a suspension
spray.
Three concentrations of the
compound—o 25, 05, and 0.75 per
cent—were sprayed in November
1956 on 48 beef heavily
infested with the common and
northern species of grubs. Sixteen
untreted animals served as
checks. Spray was pphed under
300 pounds pressure at an aver
age rate of IVz gallons per ani
mal. It' was necessary to apply
large quantities under pressure
to thoroughly wet the animals’
thick winter coats
The treatment prevented grubs
from appearing in. the backs of all
except two anmals sprayed with
Ob per cent suspension. One had
seven grubs, the other had one
that didn’t develop
Oral treatment with the new
chemical gave some control but
was abandoned because of toxicity
to cattle.
Untreated cattle in both spray
and oral tests averaged 44 grubs
per anmal Even though use of
Bayer 21/199 for cattle grub con
trol hasn’t yet been approved
ARS entomologist 0 H Graham
feels that emulsion spay treat
ments with it are very practical
(1- if applied several weeks be
fore grubs appear in the back,
and (2) if applied so as to insure
adequate skin absorption
Against the screwwonn, both
emulsion and suspension sprays
of Bayer 21/199 were effective.
Use of these sprays in controlling
screwworms would be a great
help o Ivestockmen. It would eli
minate, for example, the current
pactice of riding the range daily
hunting for infested animals and
applying a smear to the wounds.
Landis Bros.
Lancaster
J. Paul Nolt
Gap
J. H. Reitz & Son
LitiU, RD4
PROCESSED POULTRY
PHILADELPHIA, May 28
Ready to cook ice packed broil
fryers steady. Demand was
good. Supplies were adequate for
immediate trade needs
Prices paid delivered ware
house, Philadelphia (cents per lb)
Grade A & US grade A, 2-3 -lb.
34V2-37, mostly 34Vz-35.
Hens; Ready to cook (ice
packed) Steady Supplies were no
more than sufficient to meet the
good demand. _______
Prices paid delivered ware
house, Philadelphia (centvperlb)
Grade A and US grade A 4-5V2
lb. 38-40.
Receits May 27 251,000 lb
other than turkeys. Maryland.
70,000 lb , Delaware, 77,000 lb ,
Virginia, 32,000 lb, North Caro
lina, 47,000 lb.
(Animals are then kept in small
pactures for several weeks and
treated every two to four days.)
Extensive trials with over 11,-
000 sheep on nine Texas ranches
showed effectiveness of the com
pound against scewworm These
shep were sprayed- immediately
after shearing to protect shear
cuts from infestation. Another
group of 408 sheep and goats was
.treated to prevent infestation
through injuries associated with
lambing, castration, docking, ear
tagging, and old screwworm
wounds.
Most of the sprays were sus
pensions prepared from a wet
table powder containing 25 per
cent active ingredient. About one
quart of the compound was spray
ed on each sheep or goat.
In general, tests on both groups
of animals had excellent results
Sprayed animals were protected,
fi om screwworm infestation for
10 to 20 days—long enough for
most injures to heal completely or
to such an extent that they no
longer attracted screwworms.
Even where spray treatments ul
timately failed, they gave 10 days’
protection, (EQ-335, a lindane
based compound widely used by
sheep men to treat their sheep for
scewworms, fequently failed as
early as two to four days after
treatment),
Bayer 21/199 kills the screw
norm both upon contact and
through systemic action but the
systemic action lasts for only a
day after spraying. Long term
effectiveness of the compound
against the screwworm is due to
the minute paticles of insecticide
that flake off the animal’s hair in
to the wound, killing the worm.
USDA Dairy Scientists
Start Crossbreeding Study
Additional information'on whe
ther crossbreeding of dairy cattle
can usefully serve the Nation’s
dairy industry is the goal of a
study just begun by US Depart
ment of Agriculture dairy ccien-
Tists at the Agricultural Research
Center, Beltsville, Md "
The long-range project will
compare purebred Brown Swiss,
Ayrshire, and Holstein cows to
crosses of the same breeds. The
test matings have been planned
so that two- and three-way crosses
can be compared in the same gen
eration.
Results of the trials will be
evaluated on the basis of milk
production, butterfat content of
the milk, sohds-not-fat produc
tion, breeding characteristics,
birth weight, growth rate of
calves, and feed efficiency. This
study should give further infor
mation on the value of crossbreed
ing for rapid herd improvement
when sires from artificial breed
ing establishments are used.
LIVE POULTRY
PHILADELPHIA, May 28
Unsettled Trading was active as
buyers prepared for the week-end
demand which centered on hens,
caponettes and fryers. More than
ample supplies of all classes were
offered Buyers were critical on
sue and quality.
Receipts May 27 112,00 lb.
including Delaware 30,000 lb.,
Maryland 5,000 lb
Wholesale selling price No 1 &
fancy quality Broiler-fryer heavy
type 3-4 lb 22-25, pullets 4Vz lb
and over 30-31, hens, heavy type
26-29, light type 16-21, old roost
ers 10-12, ducks Pekin 30.
Expanded Hay Show Series Planned
By PSU Agronomists This Summer
J cured hay, the other for hay that
is heat dried, with a grand cham
pion for the lop entry of the
whole show.
FREE CHEMICALS analyses
will be made of the top three
samples in each class, and the
first two winners in each class
will qualify to enter hay exhibits,
in corresponding classes, at the
1059 Pennsylvania Farm Show
next January in Harrisburg.
The first show will be part of a
week-long multi-event program at
Hershey, including the annual
Pennsylvania Dutch Days and the
Pennsylvania and National Plow
ing Matches.
By NORMAN EBERLY
Penn State Ag. Editor
Samples from forage stands
soon to be harvested on Pennsyl
vania farms will be among en
tries at five district hay shows m
tne state.
Frank G. Earner, chairman of
agronomy extension at Penn State
University, said this will be the
third annual series of hay shows.
The dates: Aug. 21-23, Hershey,
for Southeast Pennsylvania; Oct.
7, Greensburg, Southwest; Oct. 9
University Park Central; Oct 30,
Titusville, Northwest, Nov. 6,
Wysox, Northeast.
BAMER SAID Dr. John E Bay
lor, extension agronomist, will
have charge of the shows, with
county agents assisting The
shows are a part of the continuing
emphasis being placed by the
University’s agricultural staff on
better hay crops. Interested or
ganizations, including seed, ma
chinery and equipment dealers,
power companies and farmer co
operatives, are lending financial
assistance.
Winners of the first five places
in each class will get ribbons. A
champion will be named for each
of two divisions one for field
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THE HERSHEY hay show will
embrace a 16 county region of
Dauphin, Lebanon, Berks, Schuyl
kill, Bucks, Lehigh, Northamp
ton, Montgomery, Philadelphia,
Delaware, Chester, Lancaster,
\ o rk, Adams, Franklin and Cum
berland
J. E. Lamus & Son (Donald),
\ork RD 3, won t)he grand cham
pionships there in 1956 and 1957,
both with field cured alfalfa.
Three special related exhibits
are planned for the Hershey show.
One will be of weeds and weed
control, one of grasses and le
gumes, and another of lime and
fertilizer.
For Your
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Quarryville, Pa.
Use in