Broadleaf Weed Management Programs in Soybean
Sustainable Production
AgricultureCrop protectionHerbicide
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Michael Marshall, Clemson University
Co-Principal Investigators:
Project Code:
Contributing Organization (Checkoff):
Leveraged Funding (Non-Checkoff):
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Institution Funded:
Brief Project Summary:

This project helps growers choose the most effective herbicide program for troublesome broadleaf weeds. This research supports ongoing research in the weed science program to test herbicide programs that are effective on problem weeds, such as Palmer amaranth, morningglory and sicklepod. Farmers cannot rely limited herbicide program, such as dicamba alone or with glyphosate, to control these weeds because of ongoing resistance concerns that have been documented. This work intends to quantify the efficacy of selected herbicide programs on control of Palmer amaranth, morningglory and sicklepod in soybean and to share results.

Key Benefactors:
farmers, agronomists, extension agents

Information And Results
Final Project Results

Updated January 8, 2021:
I have attached the final report for my soybean board project below. Thanks.

View uploaded report PDF file

The key to effective broadleaf weed management in both 2,4-D and dicamba tolerant soybean is to rotate herbicide modes-of-action and utilize residual herbicides in every application across the field (overlapping residuals starting with a preemergence residual at planting). With the occurrence of resistance in Palmer amaranth in other regions to most of these herbicides, it is critical to follow these recommendations.

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.