Page 2—Corn Talk, Lancaster Farming, Saturday, July 17,1993
Trials Prove Corn Herbicides
Need Sufficient Rainfall To Work
(Continued from Pag* 1 )
mines three different rates of
herbicide low, medium, and
high— and how the weeds are
controlled.
Farmers interested in soil
conservation and retaining sur
face crop residue should use the
late-kill rye, which provides a
nearly 90 percent cover. The
rye cover also acts as a good
weed suppressor, which, in
combination with post
emergence herbicide applica
tions, can help keep weeds to a
minimum.
The problem is, according to
the weed specialist, the remain
Several Penn State graduate assistants were on hand during the annual
Weed Tour at the Landlsville Research Station on Tuesday, Including, second
from left, Vijay Nandula, Ed Werner, and Bob Parks. Assisting in thetour were
John Yocum, research station manager, far left, and Bill Curran, Penn State
weed specialist, far right.
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mg cover can tie up
preemergence herbicides and
also promote the emergence of
cutworms, slugs, and other
insects. In addition, the rye
residue has several “allelo
pathic” effects, according to
Curran as it breaks down, it
releases toxins that hinder com
growth. Also, com emergence
can be spotty, because of skips
from ineffective com planting
through the dense cover.
The good news is, early rains
also were held in by the cover,
which acts as a mulch. And
those some “allelopathic”
20
Seconds
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Lapse
effects, in theory, according to
the weed specialist, should help
to control weeds.
Whatever the practice,
according to Curran, fanners
will need to consider using
additional weed control mea
sures if using a rye cover before
com.
Other elements of the tour
focused on early preplant com
herbicides and their effective
ness in no-till com (of which
little stood out in the treatment
of grasses, according to Curran,
but of which several were
effective on broadleaves), tria
zine programs in reduced-
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tillage com. and weed control Imidazolinone-resistant com
programs this year for varieties.
Bill Curran, Penn State weed specialist, examines
the benefits and drawbacks of using a rye cover crop
on weed emergence and Its “allelopathlc” effects on
corn at the annual Weed Tour.
Focus On Corn Exports
Demonstrates Ag Contribution
economies, but also on the eco
nomy of the United States as a
whole.
Com continually leads U.S.
agricultural exports in volume
and value. For many years,
corn has been among the
top-10 U.S. exports overall, not
just agricultural exports.
For more information about
the SO-Billionth Bushel Jubi
lee, contact the U.S. Feed
Grains Council, 1400 K St.,
NW, Suite 1200, Washington,
D.C., 20005, (202) 789-0789.
WASHINGTON, D.C.
During 1993, the United States
will pass the 50-billion-bushel
marie for com exports a
milestone for U.S. agriculture.
“This is a very significant
event,” said Kenneth Hobbie,
president and CEO of the U.S,
Feed Grains Council
(USFGC). “Sometimes we
forget the sheer enoimity of
our grain export business, how
successful we have been and
what impact it has had not only
on our agricultural and rural
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