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Combined Postemergence Grass and Broadleaf Weed Control in Canola (Brassica napus)

Published online by Cambridge University Press:  12 June 2017

Robert E. Blackshaw
Agric. Can. Res. Stn., Lethbridge, AB T1J 4B1
K. Neil Harker
Lacombe, AB T0C 1S0


Field studies were conducted to study the interaction of sethoxydim or fluazifop-P with clopyralid and/or ethametsulfuron applied as tank mixtures to canola. Control of the indicator species barley, broadbean, and wild mustard with the tank mixtures was comparable to, or sometimes better than, that attained with each herbicide alone. Canola tolerated all herbicides applied individually and all tank mixtures of these herbicides except fluazifop-P and ethametsulfuron. Tank mixtures of fluazifop-P and ethametsulfuron, with or without clopyralid included in the mixture, suppressed early growth of canola in two of four tests and reduced seed yield in one. Sethoxydim, clopyralid, and ethametsulfuron combined in tank mixtures provide an effective POST alternative for selective control of grass and broadleaf weeds in canola.

Copyright © 1990 by the Weed Science Society of America 

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