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Growth Stage and Broadleaf Herbicide Effects on CGA184927 Efficacy

Published online by Cambridge University Press:  12 June 2017

Robert E. Blackshaw  and
K. Neil Harker
Robert E. Blackshaw
Affiliation:
Res. Centre, Agric. and Agri-Food Canada, P.O. Box 3000, Lethbridge, AB, Canada T1J 4B1
K. Neil Harker
Affiliation:
Agric. and Agri-Food Can. Res. Centre, 6000 C & E Trail, Lacombe, AB, Canada TOC 0S0
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Abstract

Field experiments were conducted to determine the effect of CGA184927 rate, weed growth stage, and tank mixes with various broadleaf herbicides on the control of green foxtail and wild oat in spring wheat. CGA 184927 controlled green foxtail and wild oat equally well when applied at the 2- to 3- or 4- to 5-leaf stages. Green foxtail and wild oat were controlled at similar rates of CGA 184927 but the application rate giving > 90% control ranged from 22 to 90 g/ha over locations and years, indicating that CGA 184927 efficacy is sensitive to environmental conditions. CGA 184927 in tank mixtures was compatible with bromoxynil, clopyralid, and 2,4-D ester. However, tank mixing with metsulfuron or dicamba reduced activity on green foxtail and wild oat. Broadleaf herbicide activity on kochia and redroot pigweed was not reduced when such herbicides were tank-mixed with CGA 184927. Spring wheat tolerated 120 g/ha of CGA 184927. CGA 184927 provides growers with another herbicide option to control green foxtail and wild oat in wheat.

Keywords

Bromoxynil, 3,5-dibromo-4-hydroxybenzonitrileCGA 184927, 2-propynyl(R)-2-(4-(5-chloro-3-fluoro-2-pyridinyloxy)-phenoxy)-propionate/5-chloro-8-quinolinoxyacetic acid-1-methylhexylesterclopyralid, 3,6-dichloro-2-pyridinecarboxylic aciddicamba, 3,6-dichloro-2-methoxybenzoic acidmetsulfuron, 2-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]benzoic acid2,4-D, (2,4-dichlorophenoxy) acetic acidgreen foxtail, Setaria viridis (L.) Beauv. # SETVIkochia, Kochia scoparia (L.) Schrad. # KCHSCredroot pigweed, Amaranthus retroflexus L. # AMAREwild oat, Avena fatua L. # AVEFAwheat, Triticum aestivum L. ‘Katepwa.’Antagonismgrowth stageherbicide interactiontank mixturewheat yieldAMAREAVEFAKCHSCSETVI
Type
Research
Information
Weed Technology , Volume 10 , Issue 4 , December 1996 , pp. 732 - 737
Copyright
Copyright © 1996 by the Weed Science Society of America 

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