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Effect of Application Factors on Efficacy of Fluazifop-P-Butyl in Flax

Published online by Cambridge University Press:  12 June 2017

George H. Friesen  and
David A. Wall
George H. Friesen
Affiliation:
Morden, MB, Canada, R0G 1J0
David A. Wall
Affiliation:
Morden, MB, Canada, R0G 1J0
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Abstract

Field experiments were conducted to determine the efficacy of fluazifop-P-butyl for the control of green foxtail, wild oat, barley, and wheat in flax as influenced by spray nozzle orientation, time of day, and growth stage. Under drought conditions in 1988, control of wild oat, wheat, and barley with fluazifop-P-butyl was enhanced 75%, 53% and 78%, respectively, when nozzles were oriented to spray forward 45°. Under adequate soil moisture conditions enhancement of control was minimal. Green foxtail control improved when fluazifop-P-butyl was applied from 1700 to 2100 h, but time of day had no effect on control of wild oat, barley, or wheat. Fluazifop-P-butyl effectiveness was reduced when applied 4 d after flax emergence due to late emerging grass seedlings. Green foxtail was the most tolerant to fluazifop-P-butyl, whereas wild oat, wheat, and barley were the most susceptible.

Keywords

Fluazifop-P-butyl, butyl ester of (R)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy]propanoic acidbarley, Hordeum vulgare L. ♯ HORVXflax, Linum usitatissimum L. ‘Linott’green foxtail, Setaria viridis (L.) Beauv. ♯ SETVIwild oat, Avena fatua L. ♯ AVEFAwheat, Triticum aestivum L. ‘Katepwa’Spray nozzle orientationspray trajectorytime of applicationtime of dayAvena fatuaHordeum vulgareSetaria viridisTriticum aestivumAVEFAHORVXSETVI
Type
Research
Information
Weed Technology , Volume 5 , Issue 3 , September 1991 , pp. 504 - 508
Copyright
Copyright © 1991 Weed Science Society of America 

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References

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