Theses and Dissertations

Issuing Body

Mississippi State University

Advisor

Bond, Jason A.

Committee Member

Allen, Thomas W., Jr.

Committee Member

Gholson, Drew W.

Committee Member

McCoy, Justin

Date of Degree

5-13-2022

Document Type

Graduate Thesis - Campus Access Only

Major

Weed Science

Degree Name

Master of Science (M.S.)

College

College of Agriculture and Life Sciences

Department

Department of Plant and Soil Sciences

Abstract

A study was conducted in Stoneville and Verona, MS, to evaluate control of failed stands of corn and soybean with different herbicide treatments and application timings, as well as control of failed stand of corn with soybean planted 1 and 7 DAT (days after treatment). Clethodim plus glyphosate proved most effective across all growth stages of corn with > 90% control 7, 14, and 21 DAT. Paraquat plus metribuzin provided the greatest control of a simulated failed corn stand 3 DAT compared with all other treatments. Pooled across all herbicide treatments, 49% control was achieved when replant occurred 7 DAT compared with 46% following replant 1 DAT. These studies demonstrated clethodim plus glyphosate was most effective in control of failed stands of corn as well as the benefits of not replanting immediately after herbicide treatment. Paraquat and paraquat plus metribuzin both provided > 90% control 3, 7, and 14 DAT.

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