Page 10—Corn Talk, Lancaster Farming, Saturday, October 10, 1998
Gettysburg Area Corn
question: Are these hybrids
the help of the growers, seed ** cost ' e^ect ‘ ve on
dealer, and Pam State Exm. Accordi t 0 Larry a.
st°n Setvtce to look at die s A( i county dalty
genencally enhanced com for ' ice £
the first lime m the county. . D , f . .
Penn Stale is addressing die have Bt com, but the question
(Continued from Pago 9)
*■ 4
There was evidence, here, of feeding on the stalk
and other damage from the larvae.
FEED CARTS
• Hydrostatic Pump built in Differential
• Heavy duty D 662 Conveyor chain
• It “BRAKES” when you want it
Available in 4 Sizes:
33 Bu., 37 Bu., 51 Bu. & 74 Bu.
INEXPENSIVE
BUT NOT CHEAP]
Growers
that we want to answer is. does
the benefit of Bt com justify the
extra seed cost for the
producer?”
In late June and early July
this year, Larry visited several
of the farms with the test plots
to determine the extent of first
generation com borer damage.
What he concluded: despite
the predictions for additional
damage from overwintering
larvae, the conventional
hybrids have not been drastical
ly affected by com borer popu
lations. They have seen,
according to Swartz, some
damage from first generation
com borer.
More on the results, includ
ing yield data, will be collected
in the following months. The
data will be presented at several
meetings during the winter,
including the Adams County
Com Growers Day on Monday,
Jan. 25 at the York Springs Fire _
Hall and at the Cumberland
County Com Growers meeting
on Thursday. Jan. 28, at the
Huntsdale Fire Hall.
Much of the com was
planted early to late May. If the
com will be affected by com
borer, the first generation will
attack it in late June, feeding on
the yet-to-emerge leaves that
are still in the whorl.
In early September, Swartz
again scouted several of the
fields under study to determine
the extent of the com borer
damage. What he found
included the typical “shotgun
like” feeding at the “whorl
stage” (three feet high) on
leaves, damage to the core of
the stalks, feeding on the ear
TRIAL RESULTS
Where Quality and Value
Perform All Season Long
1998 CORN SHELLING PLOTS
DAVE FREY
Washington Boro, PA
Harvested 9/24/98
% Moisture Population Yield Bu/A
Variety
15.5%
Chemgro 7343 22.8 30,000 201.2
Chemgro 7047 19.8 32,500 198.3
Chemgro 7171 21.8 32,500 196.0
Chemgro 7596 26.6 33,000 192.5
Chemgro 7796 24.2 33,000 192.5
Chemgro 7294 25.2 32,000 187.5
Chemgro XIOB 19.3 32,000 187.3
Chemgro 7757 28.4 34,000 179.9
Chemgro 7199 25.3 33,000 178.5
Chemgro 6848 18.9 28,000 172.5
Ssae? CHEMGRO SEEDS
(Turn to Page 12)
Box 218, East Petersburg, PA 17520
717-569-3296 800-346-GROW
There was some feeding damage on the non-Bt corn
from second generation borer. The borer chews into
the stalk, leaving residue on the outside, and can
move up or down, feeding away, at the center of the
stalk. When the stalks turn dry In the fall, they can
break this can have a huge effect on grain and sil
age yields.
Some kernels were eaten by the borer at the plots.
Variety % Moisture Population Yield Bu/A
15.5%
Chemgro 7047 17.8 22,500 237.8
Chemgro 7171 18.8 23,500 231.6
Garst 8342 20.4 23,000 228.7
Chemgro 7131M1 19.4 21,000 228.4
Chemgro 7343 19.8 21,000 220.4
Chemgro 7199 19.6 24,000 216.8
Chemgro 7114 18.8 22,500 216.4
Chemgro 7596 19.6 21,500 215.3
Chemgro 7757 21.0 21,000 213.4
Chemgro 7294 17.6 22,500 212.8
Chemgro 7692 19.8 23,000 209.6
Chemgro 77981M1 20.2 23,000 199.6
CHARLES PHILLIPS
Laurel, DE
Harvested 9/19/98
PLOT WAS IRRIGATED