A2O-I ( ancaater Farming, Saturday, January 31, 1998
Volunteer Corn Could
Pose Challenges
ANDY ANDREWS
Lancaster Farming Staff
GUTHRIES VILLE (Chester
Co.) Voluntary com awn
seeds shed from an ear that pop up
like weeds the following season,
hurting good com yields is
already a problem in
Pennsylvania.
But if fanners aren’t vigilant in
their field management of new
Roundup Ready varieties, the
genetically enhanced, herbicide
resistant com can pose additional
challenges as volunteer com when
fields are rotated to soybeans.
When using the
Roundup Ready variet
ies, “use good planning
and thinking and
remembering, or you’re
going to wind up with a
real mess,” said John
Yocum, Penn State
Southeast Extension
Center Research Station
manager in Landisville.
Yocum spoke to
about 80 producers and
agri-industry represen
tatives Tuesday morn
ing during die Penn
State-sponsored Ches
ter County Crops Day at
the Guthriesville Fire
Hall.
Roundup, a widely
used all-purpose herbi
cide, will not kill
Roundup volunteer
com, Yocum noted. The
best management
strategy is to keep care
ful records of what crop
win be rotated and to
use agronomically
recommended products
that work on the
herbicide-resistant var
ieties of the volunteer,
com that sprouts.
Several applications
could end up doing the
job, but it’s important to
use proper manage
ment And it’s impor
tant to note that some
cross-pollination could
occur to make non
resistant varieties resis
tant when the com re
emerges as volunteer
com.
Additionally, Yocum
spoke about new and
updated products that
are available to growers
this year. He also spoke
about herbicides that are
pending EPA registra
tion. Yocum noted that
the herbicide “price
wars” going on will ben
efit growers, especially
for soybean products.
Prices are coming
down more than half,
the research station
manager noted.
Yocum indicated sev
eral products new for
the market this year,
including Accent Gold
from DuPont, an alter
native to atrazine, con
taining Accent and Hor
net for broad spectrum
control of broadleaves
and select grasses; Aim
40DF from FMC, apostcmcrgcnce
contact-type heifoicide; Balance
75WDG from Rhone Poulenc, a
prcemergent herbicide replace
ment for atrazine, offering control
of broadlcaf weeds; Field Master
4.25 L from Monsanto, a broad
spectrum herbicide for the 1998
season; Pinnacle 2SDF from DuP
ont, an early postapplication herbi
cide for com; and Spirit S7WG
from Novartis.
Yocum also noted that Roundup
Ready com will be available in
limited supplies (about 1 million
acres nationwide) from Dekalb.
There will only be 2-3 hybrids for
this region.
/M Lancaster
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He also provided
some corn herbicide
updates. For soybeans,
there are three new pro
ducts: Authority Broad
leaf 56.3DF from FMC
and Canopy XL 56.3 DF
from DuPont, preemer
gent material that con
trols Eastern Black
Nightshade; Firstßate
84 WDG from Dow
AgroScicnccs, formerly
Dow Elanco, used pre
or postapplication for
broadleaf weeds; and
Steel 2.59 E (American
Cyanamid), a premix
(Turn to Page A 33)
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