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Optimization of Application Efficacy for POST Herbicides with Adjuvants on Three-Cornered Jack (Emex australis Steinheil) in Wheat

Published online by Cambridge University Press:  20 January 2017

Muhammad Mansoor Javaid  and
Asif Tanveer
Muhammad Mansoor Javaid*
Affiliation:
Department of Agronomy, University College of Agriculture, University of Sargodha, Pakistan
Asif Tanveer
Affiliation:
Department of Agronomy, University of Agriculture, Faisalabad, 38040, Pakistan
*
Corresponding author's E-mail: [email protected]
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Abstract

Field studies were conducted to evaluate POST herbicides with adjuvants for the control of three-cornered jack in winter wheat. The herbicides evaluated were fluroxypyr 9.7% w/w + MCPA 38.8% w/w (formulated mixture [450 g ai ha−1]), carfentrazone-ethyl (20 g ai ha−1), bromoxynil 26.8% w/w + MCPA 40.0% w/w (formulated mixture [450 g ai ha−1]), thifensulfuron-methyl (75 g ai ha−1), and tribenuron-methyl (75 g ai ha−1), applied alone or tank mixed with the adjuvants alkyl ether sulfate sodium salt (625 mL ha−1) or fatty alcohol ethoxylate (375 mL ha−1). The addition of adjuvants to carfentrazone-ethyl resulted in > 94% control of three-cornered jack. Both adjuvants enhanced the efficacy of all herbicides for control of three-cornered jack, except thifensulfuron-methyl. However, a maximum increase in phytotoxicity on three-cornered jack was achieved with the addition of either adjuvant to tribenuron-methyl compared with herbicides used alone. Bromoxynil + MCPA and carfentrazone-ethyl gave maximum wheat yield and yield components.

Se realizaron estudios de campo para evaluar herbicidas POST con adyuvantes para el control de Emex australis en trigo de invierno. Los herbicidas evaluados fueron fluroxypyr 9.7% w/w + MCPA 38.8% w/w (mezcla en formulación [450 g ai ha−1]), carfentrazone-ethyl (20 g ai ha−1), bromoxynil 26.8% w/w + MCPA 40.0% w/w (mezcla en formulación [450 g ai ha−1]), thifensulfuron-methyl (75 g ai ha−1), y tribenuron-methyl (75 g ai ha−1), aplicados solos o en mezcla en tanque con los adyuvantes sal de alkyl ether sulfate sodium (625 mL ha−1) o alcohol graso ethoxylate (375 mL ha−1). La adición de adyuvantes a carfentrazone-ethyl resultó en >94% de control de E. australis. Ambos adyuvantes mejoraron la eficacia de todos los herbicidas para el control de E. australis, excepto thifensulfuron-methyl. Sin embargo, un incremento máximo de fitotoxicidad en E. australis se alcanzó con la adición de cualquiera de los adyuvantes a tribenuron-methyl al compararse con los herbicidas usados solos. Bromoxynil + MCPA y carfentrazone-ethyl brindaron el mayor rendimiento y componentes de rendimiento del trigo.

Keywords

Fluroxypyr + MCPAcarfentrazone-ethylbromoxynil + MCPAthifensulfuron-methyltribenuron-methylthree-cornered jack, Emex australis Steinheilwheat, Triticum aestivum L.AdjuvantsPOST herbicidesweed control
Type
Weed Management—Major Crops
Information
Weed Technology , Volume 27 , Issue 3 , September 2013 , pp. 437 - 444
Copyright
Copyright © Weed Science Society of America 

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