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Control of Quackgrass (Elytrigia repens) and Field Mint (Mentha arvensis) with Glyphosate Applied Preharvest

Published online by Cambridge University Press:  12 June 2017

Jerry A. Ivany  and
Douglas J. Doohan
Jerry A. Ivany
Affiliation:
Research Center, Agriculture and Agri-Food Canada, Charlottetown, PEI, Canada C1A 7M8
Douglas J. Doohan
Affiliation:
Nova Scotia Department of Agriculture and Marketing, Truro, NS, Canada B2N 5E3
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Abstract

Field experiments showed that quackgrass could be controlled by glyphosate applied preharvest to barley. In separate experiments, field mint was controlled by glyphosate applied pre- and postharvest to barley and wheat. Suppression of quackgrass regrowth one year following treatment was 90% or greater when glyphosate was applied at 0.9 kg ai/ha alone or at 0.45 kg ai/ha in combination with both tallow amine ethoxylate at 0.5% of total spray volume and ammonium sulfate at 3 kg/ha. Field mint shoot counts were reduced 84% the year following treatment when glyphosate was applied at 0.25 kg ai/ha and 95% when applied at 1.0 kg ai/ha. Suppression of field mint shoot regrowth the following year was 84% when glyphosate was applied postharvest and 93% when applied preharvest. Addition of tallow amine ethoxylate did not improve field mint control. Glyphosate applied preharvest to barley and wheat at less than 30% grain moisture content had no effect on grain yield.

Keywords

barley, Hordeum vulgare L.field mint, Mentha arvensis L. MENARGlyphosate, N-(phosphonomethyl) glycinequackgrass, Elytrigia repens (L.) Nevski, # AGRREwheat, Triticum aestivum L.Spike countshoot countAGRREMENAR
Type
Research
Information
Weed Technology , Volume 11 , Issue 4 , December 1997 , pp. 744 - 747
Copyright
Copyright © 1997 by the Weed Science Society of America 

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References

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