2014
Risk of stacked dicamba and glyphosate resistance in kochia and best management practices
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Contributor/Checkoff:
Kansas Soybean Commission
Category:
Sustainable Production
Keywords:
AgricultureCrop protectionHerbicide
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Phillip Stahlman, Kansas State University
Co-Principal Investigators:
Mithila Jugulam, Kansas State University
Project Code:
Contributing Organization (Checkoff):
Kansas Soybean Commission
(n/a)
Institution Funded:
Kansas State University
(n/a)
Brief Project Summary:

Widespread adoption of glyphosate-resistant (GR) crops and the associated increased use of glyphosate, often exclusive of other herbicides, are generally believed responsible for the evolution of GR-weeds around the globe. Glyphosate-resistant kochia was first reported in Kansas in 2007 and during the past two years has spread throughout western Kansas and adjacent states.

Dicamba and glyphosate dose response trials on multiple kochia populations from throughout the central Great Plains were initiated in Kansas State University greenhouses at Hays and Manhattan. Preliminary results indicate differing response among populations to both dicamba and glyphosate with some populations exhibiting...

Unique Keywords:
#dicamba-resistance, #glyphosate studies, #kochia, #weed control, #weed control-herbicide resistance
Information And Results
Final Project Results

Update:

View uploaded report Word file

Several populations with low-level or greater resistance to dicamba also were resistant to glyphosate, indicating stacked resistance. Additional testing is being conducted to confirm these results. Low to moderate-level resistance to dicamba found in some kochia populations indicates the need for strong stewardship recommendations for dicamba use and diverse management practices to prevent further evolution of kochia resistance to dicamba.

The United Soybean Research Retention policy will display final reports with the project once completed but working files will be purged after three years. And financial information after seven years. All pertinent information is in the final report or if you want more information, please contact the project lead at your state soybean organization or principal investigator listed on the project.