The Effect of Anionic Surfactants on Herbicide Mixtures and Solutions

Authors

Ely Anderson, University of Nebraska-LincolnFollow

First Advisor

Greg R. Kruger

Second Advisor

Nevin C. Lawrence

Date of this Version

Summer 5-21-2021

Document Type

Thesis

Citation

Anderson, Ely (2021) . The Effect of Anionic Surfactants on Herbicide Mixtures and Solutions. Master's thesis. Lincoln, NE: University of Nebraska

Comments

A THESIS Presented to the Faculty of The Graduate College at the University of Nebraska In Partial Fulfillment of Requirements For the Degree of Master of Science, Major: Agronomy, Under The Supervision of Professor Greg R. Kruger. Lincoln, Nebraska: May, 2021

Copyright © 2021 Ely Daniel Anderson

Abstract

Herbicide mixtures are popular for farmers to delay the evolution of herbicide-resistant biotypes from occurring and control existing herbicide-resistant weeds. Glufosinate is a contact herbicide that has been observed as a mixture partner with many herbicides. In many cases, antagonistic interactions have occurred when using glufosinate in mixture with other herbicides. The antagonistic interactions have resulted in applications with incomplete weed control. Adjuvants have been known to impact an herbicide application by increasing herbicide penetration, spreadability, and efficacy. Adjuvants added to glufosinate mixtures can impact spray applications and increase weed control. The objectives of this research were: (1) investigate the interactions, efficacy, and physical properties of glufosinate, dicamba, or 2,4-D alone or in mixture with two anionic surfactants; (2) Observe and evaluate the efficacy, interactions, and physical properties of unformulated glufosinate and unloaded glyphosate alone, in mixture, and with two anionic surfactants; and (3) evaluate three anionic surfactants at different dose rates when added to herbicide mixtures and solutions of glufosinate, dicamba, 2,4-D, and glyphosate.

Advisor: Greg R. Kruger