Every year growers may experience challenges when controlling winter annuals weeds or terminating cover crops with glyphosate-based burndown herbicide programs, specifically when glyphosate is sprayed in cool, cloudy weather conditions or tank mixed with residual herbicides, ATS, or synthetic auxins (issue mostly for grasses).
As harvest season progresses quickly this fall due to favorable weather conditions and our crops come out of the field, now is the time to think about weed control for winter annual weeds, including marestail.
Indiana growers have shown increased interest in utilizing cover crops in our corn and soybean production systems over the last decade. Concurrently, there has also been increased utilization of soil residual herbicides to help manage herbicide-resistant weeds such as marestail (horseweed), waterhemp, and giant ragweed in our corn and soybean production systems. Soil residual herbicides can remain active in the soil for a period of weeks to months after application. The length of time a residual herbicide remains biologically active in the soil is influenced by soil texture, soil pH, organic matter, rainfall, and temperature. Since these factors will vary from field to field, definitive time intervals of residual herbicide activity can be difficult to predict. The use of residual herbicides in our corn and soybean production systems may interfere with establishment of fall seeded cover crops under certain conditions. Unfortunately, many of the species being used for cover crops[Read More…]
Split Applications Of Soil Residual Herbicides In Corn
In the last couple of years, we have received multiple calls regarding the control of volunteer corn in Enlist and Xtend soybeans systems.
By now most of you are aware of the ruling in the 9th Circuit Court that vacates the labels Xtendimax/Fexapan, and Engenia.
We are less than a month away from the cutoff date for approved dicamba product applications in Xtend soybean.
There are several buttercup species found in Indiana.
Due to the recent cold wet weather, corn planted in late April has either struggled to emerge or the corn that did emerge may have been severely injured by frost events.
Quackgrass (Elymus repens) is a cool-season perennial grass, generally found in vacant fields or along roadsides that are not regularly mowed.
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