2017
Minimizing Carryover Herbicide Damage to NC Soybean Production
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Contributor/Checkoff:
North Carolina Soybean Producers Association
Category:
Sustainable Production
Keywords:
AgricultureCrop protectionHerbicide
Parent Project:
This is the first year of this project.
Lead Principal Investigator:
Travis Gannon, North Carolina State University
Co-Principal Investigators:
Project Code:
17-033
Contributing Organization (Checkoff):
North Carolina Soybean Producers Association
$25,200
Institution Funded:
North Carolina State University
$25,200
Brief Project Summary:

Herbicide carryover is its unintended persistence in the soil from one crop to the next and can occur in double-cropped or full-season system where soybeans follow wheat or corn. The goal of this project is to generate information on soybean sensitivity to metribuzin and on herbicide carryover in soybeans to address the current knowledge gap. This includes distinguishing Official Variety Trial soybean lines based on their response to metribuzin and other herbicide treatments and continuing studies to determine if different varieties have different physiological responses to residual herbicides. Results of this work will help growers make decisions about herbicide selection and application and soybean variety selection.

Key Benefactors:
farmers, agronomists, extension agents

Information And Results
Project Deliverables

Final Project Results

Soil collection and herbicide dissipation experiments (Objective 1) were initiated in Fall 2017 and completed in Spring 2018. Data was analyzed and a pilot study for evaluation of injury threshold and bioavailability of the three herbicides using sensitive bioindicator species was conducted. The data from this experiment will be used to design a full-scale injury threshold study, where a range of herbicide concentrations will be investigated to determine the threshold for soybean damage. NC adapted soybean germplasm will be screened for variation in carryover herbicide sensitivity (Objective 3) in Summer 2018 and growth, development, seed yield, biomass and leaf area will be measured. The data will be analyzed and the findings from these studies will be disseminated to NC soybean producers (Objective 4) in Winter 2019 and Spring 2020 to help NC soybean growers optimize herbicide use programs, save on pesticide input costs and improve soybean yield.

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.