Albany, Gentry County
* August 28, 2013
* September 26, 2013
1109 S. Birch St.
Albany, MO 64402
Agronomy in Missouri's Northwest
by Donald E. Null, Regional Agronomy Specialist (8/96)
Today, in north Missouri, if a company doesn't have a
herbicide or a herbicide program that control's waterhemp
then that company doesn't have a useful tool for farmers.
This is the third year that waterhemp has been a serious
problem in the area. Fortunately the weed can be controlled.
A lot of our tests this year at Hundley-Whaley were
designed around the control of waterhemp. We are grateful
to the Missouri Soybean Merchandising Council for
financially supporting two studies that allows us to
determine the best waterhemp herbicides on the market along
with the best application times for post diphenylether
One test includes twenty-six treatments and the other
includes thirty-seven treatments. The results have been
somewhat surprising. If you have ever wondered which
pre-emergence herbicide does the best job of controlling
waterhemp - or if you have ever wondered about the best time
to apply a post emergence waterhemp control product, then
you will not want to miss the 1996 Hundley-Whaley farm tour.
Following the tour you should be able to answer these questions.
- Which post emergence herbicide provided the best control
of waterhemp in 1996?
- Which incorporated and/or pre-emergence herbicide provided
the best control of waterhemp in 1996?
- What application timing and herbicide rate was best for
waterhemp control in 1996?
- Could you have saved money or made more money by
knowing the answers to these questions earlier this spring?
LIBERTY LINK CORN:
Several studies at the Hundley-Whaley Farm are centered
around the use of Liberty and other herbicides on glufosinate
tolerant, "Liberty Link", corn. This technology should be
available for use on your farm in 1997. We have learned
several things about Liberty this year and we would like to
share our knowledge with you at the field day. We should be
able to answer questions like:
We will also have company representatives at the tour and they
should be able to answer questions about seed availability, price
and regulatory clearances.
- Which weeds is Liberty strong on and which weeds are
a problem for the compound to control?
- When should Liberty be applied for best results?
- Does Liberty fit best in a conventional till or a no-till
corn production program?
This years tour is less than a month away. It will be held at the
farm in Albany on Thursday, September 5. The first tour leaves at
9 a.m. and tours will go on throughout the day with the last tour
starting at 2 p.m.
There are four separate and distinct tours this year. Each tour
will carry 1 unit of CCA credit. There is no charge for any event,
or the meal, at Hundley-Whaley.
If you are a regular, or if you have never attended a tour, you
are welcome. You can go on one tour or all four. We will make every
effort to make it worth your time.
ROUNDUP TO KILL CORN?
Everyone knows that corn is very sensitive to Roundup- Right? That
is a big concern for people applying Roundup to Roundup Ready beans.
How much Roundup drift can corn take without damage? Would you guess
a pint? Eight ounces? Less? One of the studies at the Hundley-
Whaley farm this spring was designed to answer that question. Burrus
BX86 corn was planted and grown to 12" tall and then treated with
Roundup as a broadcast application. The high rate of Roundup was 16
ounces per acre. We cut that rate in half and continued to cut rates
in half until we applied as little as little as 1/8th ounce per acre.
We will harvest the plots to see if ultra low rates of Roundup
decreased yields but I think you will be surprised at the rate that
ceased to cause visual damage to the corn. Come to the field day of
September 5 to see for yourself.
Next year we will probably run this study again but with
modifications. One change will be to start making Roundup
applications earlier, to smaller corn. If you have suggestions on
experiments we can run, there is a place on the registration card to
note them. I and the planning committee welcome your input.
There are a lot of new herbicides just a year or two from being
placed on the market. We have always prided ourselves for having
them at Hundley-Whaley in time for north Missouri farmers to see
them prior to use on their own farm. A few of the new ones are:
- Authority: A new soil applied soybean herbicide by FMC
that shows excellent control of waterhemp and grass in this
- Axiom: A new soil applied product from Bayer that shows
good control of waterhemp.
- Balance: A new Rhone-Poulenc herbicide that is soil
applied for weed control in corn. It probably won't be
available until 1998 but it is one to watch. For the last
two years it has provided outstanding control water-hemp and
- Action: A new post applied herbicide from Ciba that is
death on velvetleaf in corn.
- Raptor: A new herbicide from American Cyanamid. The
chemistry of this herbicide is closely related to Pursuit.
It looks very good in our trails but it has some of the same
weaknesses as Pursuit. Those weaknesses can be overcome with
tank mixes though.
VISIT WITH UNIVERSITY AND INDUSTRY REPS:
Attending the Hundley-Whaley field day is a great opportunity to
visit with a lot of knowledgeable people. State and regional
extension specialists will be there along with most of the technical
and sales people from crop protection and crop variety companies. I
have never yet met any one person who has all of the answers but
among the bunch that you will find at Hundley-Whaley, there will be
few questions that can't be answered. Come, visit and learn from
Graves Field Update Another event to take in is the Graves
Memorial Field tour on Tuesday, August 27. Extension specialist
Rick Bottoms, Bob Chapple and Don Mobley work together to put on
this event. This year they have seventy studies and over 2500
plots. These studies include research on nitrogen fertility, corn
starter fertilizer, long term use of ammonium sulfate in corn,
nitrogen credit to corn following soybeans and fall regrowth in
forages. One of the tour stops will be on the long term research
addressing soil erosion and different tillage systems in corn and
soybeans. There will also be tour stops on corn and soybean
diseases, including corn rust and gray leaf spot, soybean seed
treatments and soybean cyst-nematodes. Plan to attend the Graves
Memorial Field Agricultural Experiment Center Field Day on Tuesday,
August 27th at 9:30 a.m. near Corning and I-29. CCA/CEU Units will
The Missouri Agricultural Experiment Station is the research arm of the
College of Agriculture, Food and Natural
at the University of Missouri-Columbia
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