2016
Investigating Suspected Herbicide Resistant Weed Populations
Category:
Sustainable Production
Keywords:
AgricultureCrop protectionHerbicide
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Wesley Everman, North Carolina State University
Co-Principal Investigators:
Project Code:
16-051
Contributing Organization (Checkoff):
Institution Funded:
Brief Project Summary:

Suspected herbicide resistant weeds were collected from fields across North Carolina in 2015 and 2016. These ranged from common ragweed to Palmer amaranth. Through this project, as many as possible were planted in the greenhouse through fall, winter and spring. The results confirm some resistances, while other populations have additional testing required to determine why they survived herbicide applications. This project aims to continue testing to determine the scope of herbicide resistance in North Carolina.

Key Benefactors:
farmers, agronomists, extension agents

Information And Results
Project Deliverables

Final Project Results

Herbicide resistance in weeds has surged in the past 2 growing seasons. This is, in part, due to the over-reliance on a single mode of action for broadleaf control in soybean and crops grown in rotation. The confirmation of multiple species resistant to the PPO inhibitors will impact management decisions, and limit the effective use of multiple modes of action in new herbicide tolerant varieties. We will continue to monitor the incidence of resistant weeds in order to provide effective management options for growers. In the future, a defined screening protocol for suspected resistance with a steady source of funding may be necessary. The time and space to conduct these studies is substantial, especially with multiple species of weeds developing resistance to multiple modes of action. I feel we have provided rapid assessment and confirmation of resistance in the past 2 years through this research, allowing growers to make timely decisions based on new threats in the state.

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.