 Soybean
Podcasts
Burndown Herbicide Program in Soybean
March 10, 2010
(3 minutes: 6 seconds)
3GP (3G Mobile Phones)
(3 minutes: 6 seconds)
MP3 (audio only)
(3 minutes: 6 seconds) WMV (PC)
Audio/Video Script:
Burndown herbicides have become a major consideration for
most Arkansas growers. This time of year, March, standing out here in this field, it’s ready for a burndown herbicide application. The
purpose for burndown herbicides is to provide removal of all the winter
vegetation, undesirable weeds that are out here at this time.
A lot of times growers will choose to add a residual
herbicide in with their burndown product to help get from this time until
planting time. And burndown herbicides have also become a lot more important in
the state as we increase our no-till production acres.
When we talk about burndown herbicides in Arkansas we are primarily talking
about these non-selective herbicides, Roundup, Ignite
herbicide, and Gromoxone herbicide and again these provide a broad spectrum
control.
A lot of times a choice of herbicide depends on what crop the
grower is going to plant, it also can depend on the type of weeds that are
present in the field.
One major burndown concern that we have in Arkansas is getting control of our
glyphosate resistant horseweed. This horseweed
has evolved over the past few years to be resistant to the herbicide glyphosate,
which again is a major herbicide for us in burndown.
University data has shown that eight ounces of Clarity and sometimes a quart
of 2-4D will provide adequate control of this pest. One thing about using dicamba
and 2-4D in a burndown is you have to watch the plant-back intervals.
All of this information is available in our MP-44 –
Recommended Chemicals for Weed and Brush which is available on the UAEX website. In addition
to that a lot of growers again choose to add a residual herbicide to their burndown program. Typically for horseweed we recommend Valor or one of the Valor
containing premixes is an excellent option for horseweed,this can be applied up to thirty days prior to planting
any crop and up to immediately prior to planting soybeans.
In addition to glyphosate resistant horseweed, we also have
identified at least one population of glyphosate resistant ryegrass in the
state. And we definitely suspect that there are others. Ryegrass again is a grass-weed typically infest in the borders of the
field.
What we have observed in our control studies is that we can
overcome glyphosate resistance by adding twelve ounces of SelectMax or
possibly changing burndown programs and going with a Gromoxone
program and tank mixing that with either Syncore or diruon for increased
efficacy.
Your Arkansas Soybean Podcast is a production of the University
of Arkansas Division of Agriculture and was funded in part by the Arkansas
Soybean Promotion Board. For more information on soybean farming in Arkansas
contact your local county Extension Office.
Back to
Soybean Podcasts
|
