Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Dodds, Darrin M.

Committee Member

Riley, John Michael

Committee Member

Mills, James Anthony

Committee Member

Irby, J. Trenton

Committee Member

Bond, Jason A.

Date of Degree

8-15-2014

Document Type

Graduate Thesis - Open Access

Major

Agronomy

Degree Name

Master of Science

College

College of Agriculture and Life Sciences

Department

Department of Plant and Soil Sciences

Abstract

Experiments were conducted to evaluate efficacy of dicamba, glufosinate, and glyphosate on Palmer amaranth (Amaranthus palmeri S. Wats.). Residual control was evaluated after dicamba was applied alone and in combination with fomesafen, fluometuron, acetochlor, and prometryn. Postemergence efficacy of dicamba, glufosinate, and glyphosate on different size Palmer amaranth was also evaluated. In addition, combinations of dicamba, glufosinate, and glyphosate were evaluated for efficacy on Palmer amaranth as well as spray coverage and spray droplet size as affected by various spray nozzles. Lastly, tolerance to dicamba, glufosinate, and glyphosate of cotton cultivars containing Bollgard II® XtendFlex™ technology was examined. Dicamba exhibited preemergence activity on Palmer amaranth; however, activity was heavily dependent on rainfall. Postemergence applications of dicamba increased control of Palmer amaranth. Spray nozzle selection influenced spray coverage and droplet size. Tolerance of cultivars containing Bollgard II® XtendFlex™ technology was over 90% at the end of the year regardless of herbicide.

URI

https://hdl.handle.net/11668/20086

Comments

glyphosate||dicamba||glufosinate

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