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Flumioxazin Preplant Burndown Weed Management in Strip-Tillage Cotton (Gossypium hirsutum) Planted into Wheat (Triticum aestivum)

Published online by Cambridge University Press:  20 January 2017

Andrew J. Price
Affiliation:
Crop Science Department, P.O. Box 7620, North Carolina State University, Raleigh, NC 27695
John W. Wilcut*
Affiliation:
Crop Science Department, P.O. Box 7620, North Carolina State University, Raleigh, NC 27695
John R. Cranmer
Affiliation:
Valent USA Corporation, Suite 250-3, 1135 Kildaire Farm Road, Cary, NC 27511
*
Corresponding author's E-mail: john_wilcut@ncsu.edu

Abstract

Experiments were conducted at two locations in North Carolina from 1999 to 2000 to evaluate flumioxazin preplant (PP) for weed management in strip-tillage cotton planted in winter-wheat cover. Flumioxazin PP was evaluated at two rates alone and in mixture with two commonly used PP herbicides and one experimental PP herbicide. Flumioxazin PP at 71 or 105 g ai/ha tank mixed with the isopropylamine salt of glyphosate at 1.12 kg ai/ha, paraquat at 1.05 kg ai/ha, or the trimethylsulfonium salt of glyphosate at 1.12 kg ai/ha controlled common chickweed, common lambsquarters, common ragweed, Palmer amaranth, and smooth pigweed ≥ 96% 29 to 43 d after treatment (DAT). Both glyphosate formulations and paraquat alone provided ≥ 91% control of common chickweed and henbit 29 to 43 DAT, but control of common lambsquarters, common ragweed, large crabgrass, Palmer amaranth, and smooth pigweed was ≤50%. Treatments including flumioxazin injured cotton (≤ 5%) at one location. In all comparisons within a location, cotton treated with flumioxazin PP at 71 or 105 g/ha in mixture with either glyphosate formulation or with paraquat provided equivalent or higher yields than did cotton not treated with flumioxazin PP.

Type
Research
Copyright
Copyright © Weed Science Society of America 

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