2021
Controlling weeds in soybean
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Contributor/Checkoff:
South Dakota Soybean Research and Promotion Council
Category:
Sustainable Production
Keywords:
AgricultureCrop protectionHerbicide
Parent Project:
Controlling weeds in soybean
Lead Principal Investigator:
Sharon Clay, South Dakota State University
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
South Dakota Soybean Research and Promotion Council
$67,000
Institution Funded:
South Dakota State University
$67,000
Brief Project Summary:

The project’s first objective is to continue herbicide demonstration plots at three experiment stations to show products in action under local environmental conditions. The second objective is to assess alternative herbicide treatments on glyphosate-resistant waterhemp. The third objective is to continue the assessment of Xtend and add Enlist-type soybeans at several locations and planting dates to help growers evaluate the strengths and weaknesses of these varieties. Bradyrhizobia applications at about V5 will determine if this foliar application changes yield potential, protein content, or nodulation. The fourth objective is to examine drift on non-dicamba resistant soybean after injury with other products and determine effects on yield.

Key Benefactors:
farmers, agronomists, extension specialists

Information And Results
Project Deliverables

A series of herbicide program demonstration plots including herbicide (glyphosate) resistance options in soybeans will be established at three locations; Southeast SD Research Farm (Beresford), Northeast SD Research Farm (South Shore) and the SDSU Volga Research Farm. The primary objective of this portion of the project is to increase grower knowledge of herbicide resistance in soybean weed control programs (primarily common waterhemp and kochia) and help growers to fine-tune their weed management strategies. The strategies will include treatments of preemergence, pre-post combinations, post emergence, and new technology herbicide options such as Liberty, Xtend, 2,4-D and Balance.

The demonstration plots will be utilized for grower and professional agronomist tours and training events. Data taken from the plots will include weed efficacy, crop injury ratings, and yield. Cost of treatment will also be calculated. Results will be printed in the annual SDSU Extension WEED Project Data book and will also be used in updating the weed control section of the SDSU Pest Management Guide-Soybeans and IGrow Soybean Production manual. Pictures of the plots and plot data will be used at winter meetings around the state. Examples of meetings that data will be used at include Commercial Applicator Training, Private Applicator Training, Row Crop Clinics, IPM Consultant Training and Winter IPM Short Course.

The glyphosate resistant plots will be utilized for grower and professional agronomist tours and training events. Data taken from the plots will include weed efficacy, crop injury ratings, and yield. Cost of treatment will also be calculated. Results will be printed in the annual SDSU Extension WEED Project Data book and will also be used in updating the weed control section of the SDSU Crop Protection Guide-Soybeans and IGrow Soybean Production manual. Pictures of the plots and plot data will be used at winter meetings around the state. Examples of meetings that data will be used at include Commercial Applicator Training, Private Applicator Training, Row Crop Clinics, IPM Consultant Training and Winter IPM Short Course.


Final Project Results

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.