2019
Development of a Rapid Monitoring and Testing Strategy forEarly Detection of Glufosinate-Resistant Palmer Amaranth in Soybean Fields
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Contributor/Checkoff:
North Carolina Soybean Producers Association
Category:
Sustainable Production
Keywords:
AgricultureCrop protectionHerbicide
Parent Project:
Development of a Rapid Monitoring and Testing Strategy for Early Detection of Glufosinate Resistant Palmer Amaranth in Soybean Fields
Lead Principal Investigator:
Wesley Everman, North Carolina State University
Co-Principal Investigators:
Project Code:
18-013
Contributing Organization (Checkoff):
North Carolina Soybean Producers Association
$38,000
Institution Funded:
North Carolina State University
$38,000
Brief Project Summary:

Palmer amaranth is the most troublesome weed in soybean production in North Carolina due to its ability to produce dense and competitive populations and its resistance to herbicides like glyphosate and ALS-inhibitors. Recently, research identified a glufosinate-resistant Palmer amaranth population. This project develops a rapid bioassay to identify glufosinate-resistant Palmer amaranth populations and a monitoring strategy for soybean-producing areas in North Carolina. This will help soybean growers avoid losing the effectiveness of one of their most important weed control tools, as eradication can be implemented before the resistance trait is dispersed in the weed population.

Key Benefactors:
farmers, agronomists, extension agents

Information And Results
Final Project Results

Glufosinate needs to be applied to Palmer amaranth plants less than 4inches in height. If Palmer amaranth is treated at a taller height, some control will be realized but the Palmer amaranth plants will produce seeds resulting in more weeds to control the following growing season and may be able to survive a labelled rateof glufosinate. However, if additionalresidual-activeherbicides are tank-mixed with glufosinate, control failures and escapes may be mitigated.

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.