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Summer Annual Weed Control with 2,4-D and Glyphosate

Published online by Cambridge University Press:  20 January 2017

Andrew P. Robinson ,
David M. Simpson  and
William G. Johnson
Andrew P. Robinson
Affiliation:
Department of Botany and Plant Pathology, 915 W. State Street, Purdue University, West Lafayette, IN 47907
David M. Simpson
Affiliation:
Dow AgroSciences, 9330 Zionsville Road, Indianapolis, IN 46268
William G. Johnson*
Affiliation:
Department of Botany and Plant Pathology, 915 W. State Street, Purdue University, West Lafayette, IN 47907
*
Corresponding author's E-mail: wgj@purdue.edu
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Abstract

The introduction of 2,4-D-resistant crops stacked with glyphosate resistance will enable the use of 2,4-D and glyphosate for weed control in corn, cotton, and soybean. Because there is little reported on the effectiveness of 2,4-D plus glyphosate on summer annual weed control, the objective was to evaluate 2,4-D and glyphosate tank mixtures on summer annual weed control. Six rates of 2,4-D (0, 280, 420, 560, 840, and 1,120 g ae ha−1) and three rates of glyphosate (0, 840, and 1,120 g ae ha−1) were applied to common lambsquarters, common waterhemp, giant ragweed, giant foxtail, and velvetleaf. Glyphosate at 840 g ha−1 controlled all weeds 94 to 100%. Giant ragweed was controlled 99 to 100% by 2,4-D alone when rates were 280 g ha−1 or higher. Common lambsquarters, common waterhemp, and velvetleaf control increased as 2,4-D rates increased, with 1,120 g ha−1 providing 90 to 94% control.

La introducción de cultivos con resistencia a 2,4-D en combinación con resistencia a glyphosate hará posible el uso de 2,4-D y glyphosate para el control de malezas en maíz, algodón y soya. Debido a que hay pocos reportes sobre la efectividad de 2,4-D más glyphosate en el control de malezas anuales de verano, el objetivo fue evaluar mezclas en tanque de 2,4-D y glyphosate en el control de estas malezas. Seis dosis de 2,4-D (0, 280, 420, 560, 840 y 1120 g ae ha−1) y tres dosis de glyphosate (0, 840 y 1120 g ae ha−1) fueron aplicadas a Chenopodium album, Amaranthus rudis, Ambrosia trifida, Setaria faberi y Abutilon theophrasti. Glyphosate a 840 g ha−1 controló todas las malezas de 94 a 100%. A. trifida fue controlada 99 a 100% con 2,4-D solamente cuando las dosis fueron 280 g ha−1 o mayores. El control de C. album, A. rudis y A. theophrasti aumentó al incrementarse las dosis de 2,4-D, con 1120 g ha−1 brindando 90 a 94% de control.

Keywords

Glyphosate2,4-Dcommon lambsquarters, Chenopodium album L. CHEALcommon waterhemp, Amaranthus rudis Sauer AMATAgiant ragweed, Ambrosia trifida L. AMBTRgiant foxtail, Setaria faberi Herrm SETFAvelvetleaf, Abutilon theophrasti Medik. ABUTHcorn, Zea mays L.cotton, Gossypium hirsutum L.soybean, Glycine Max (L.) MerrAryloxyalkanoate dioxygenase-12aryloxyalkanoate dioxygenase-1glyphosate resistant
Type
Weed Management—Major Crops
Information
Weed Technology , Volume 26 , Issue 4 , December 2012 , pp. 657 - 660
Copyright
Copyright © Weed Science Society of America 

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