Database Research Summaries
2018 USB Multi State Herbicide Resistant Crops and Weeds

calendar_today Year of Research: 2018
update Posted On: 12/05/2019
group Bill Johnson (Principal Investigator, Purdue University), Micheal Owen (Co-Investigator, Iowa State University), Dallas Peterson (Co-Investigator, Kansas State University), Christy Sprague (Co-Investigator, Michigan State University), Richard K Zollinger (Co-Investigator, North Dakota State University), Aaron Hager (Co-Investigator, Southern Illinois University), Mark Loux (Co-Investigator, Ohio State University), J D Green (Co-Investigator, University of Kentucky), Kevin Bradley (Co-Investigator, University of Missouri), Larry Steckel (Co-Investigator, University of Tennessee), Shawn Conley (Co-Investigator, University of Wisconsin)
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Research Focus

The focus of this project is to improve grower ability to manage and prevent further development of herbicide- resistant weeds in soybean production systems. In addition, they will initiate educational programs on the use of new technologies in preparation for the commercial release of new herbicide resistant traits.


  • Conduct the herbicide-resistant crop and weed field days and workshops and distribute publications.
  • Extension weed scientists meet to discuss weed management challenges faced this season and educational material to be produced and used during winter meeting season. Update the publications released prior to the introduction of Xtend soybeans and dicamba herbicides used in Xtend soybeans.
  • Herbicide resistant crop and weed meetings are held in each state (1-5 meetings per state). The Take Action program is presented to farmers so they understand who is funding it and publications are distributed at these meetings. Initial drafts of new publications on the use and stewardship of new herbicide resistance traits are developed if the traits are fully approved for use.
  • Plan herbicide-resistant crop and weed field days and summer workshops. Initiate demonstration trials at site with herbicide-resistant weeds. Work with county educators and the local ag industries to publicize the events. Finish off publications that will be used in the summer field days.


  1. We are in the process of revising all of the current publications we have produced to include information on use of the Xtend soybean system for weed control. All authors have reviewed the publications they wrote and corresponded the edits to Osborn and Barr for final layout.
  2. We have initiated the writing of two new 1 page factsheets on giant foxtail and barnyard grass, which have become bigger problem weeds as the glyphosate resistance epidemic continues to evolve.
  3. With the full approval of the Xtend soybean system (dicamba resistant) in 2017, our activities during the summer of 2018 were again dominated by the off-site movement of dicamba to sensitive vegetation (in addition to our normal summer activities). Field visits, phone conversations, electronic communications, conference calls, field day presentations, and newsletter articles were done by every member of the group.


Growers will access best management practices, both through extension publications and through the Take Action program.

For more information about this research project, please visit the National Soybean Checkoff Research Database.

Funded in part by the soybean checkoff.