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Synergistic Mixtures of Sethoxydim and Fluazifop on Annual Grass Weeds

Published online by Cambridge University Press:  12 June 2017

K. Neil Harker  and
P. Ashley O'Sullivan
K. Neil Harker
Affiliation:
Agric. Can. Res. Stn., Bag Service 5000, Lacombe, Alberta, Canada T0C IS0
P. Ashley O'Sullivan
Affiliation:
Agric. Can. Res. Stn., Bag Service 5000, Lacombe, Alberta, Canada T0C IS0
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Abstract

Greenhouse and field experiments were conducted at the Lacombe Research Station to evaluate mixtures of sethoxydim and fluazifop on green foxtail, wild oat, wheat, and barley in canola. In both environments the two herbicides interacted on the grass species in a synergistic manner. Many of the observed responses to mixtures of sethoxydim and fluazifop were 100% greater than those expected assuming an additive interaction between the herbicides. Mixtures with at least 80 g ha-1 of sethoxydim and 80 g ha-1 of fluazifop controlled more than 90% of green foxtail, wild oat, wheat, and barley under field conditions. These experiments indicate that the sethoxydim/fluazifop mixture is both complementary and synergistic. The mixture may allow reduced herbicide application rates and therefore reduced herbicide costs and less potential for negative environmental impact.

Keywords

Fluazifop, (±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidsethoxydim, 2-[1-(ethoxyimino)-butyl]-5-[2-(ethylthio)-propyl-3-hydroxy-2-cyclohexen-1-onegreen foxtail, Setaria viridis (L.) Beauv. ♯ SETVIwild oat, Avena fatua L. ♯ AVEFAbarley, Hordeum vulgare L.canola, Brassica campestris L. ‘Candle’wheat, Triticum aestivum L.Herbicide mixturesAvena fatuaBrassica campestrisHordeum vulgareSetaria viridisTriticum aestivumAVEFASETVI
Type
Research
Information
Weed Technology , Volume 5 , Issue 2 , June 1991 , pp. 310 - 316
Copyright
Copyright © 1991 Weed Science Society of America 

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