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Effect of Tillage and Glyphosate on Control of Quackgrass (Elytrigia repens)

Published online by Cambridge University Press:  12 June 2017

Kevin Chandler ,
Stephen D. Murphy  and
Clarence J. Swanton
Kevin Chandler
Affiliation:
Dep. Crop Sci., Univ. Guelph, Guelph, ON, Canada N1G 2W1
Stephen D. Murphy
Affiliation:
Dep. Crop Sci., Univ. Guelph, Guelph, ON, Canada N1G 2W1
Clarence J. Swanton
Affiliation:
Dep. Crop Sci., Univ. Guelph, Guelph, ON, Canada N1G 2W1
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Abstract

Field studies were conducted during two soybean-corn rotations to evaluate the effect of tillage systems on quackgrass growth and control with and without glyphosate. In the final year of the study, tillage alone (compared to no-till) resulted in 88%, 78%, 64%, and 31% control of quackgrass with fall moldboard plow, spring moldboard plow, fall soil-saver, and spring soil-saver tillage, respectively. When glyphosate was used to control quackgrass, crop yields increased as tillage was reduced and excellent control of quackgrass in no-till was achieved. Increased shoot growth (in moldboard plowed and fall soil-saver tillage plots), exposure of rhizomes in winter (in fall tilled plots), and increased depth of rhizome burial (in spring tilled plots) increased quackgrass control. In general, the total biomass of quackgrass was reduced in drier years. Nonetheless, drought increased crop yield losses caused by quackgrass interference.

Keywords

Quackgrass, Elytrigia repens (L.) Nevski. # AGRREglyphosate, N-(phosphonomethyl)glycineWeed managementno-tillageglyphosaterow cropsrhizomesAGRRE
Type
Research
Information
Weed Technology , Volume 8 , Issue 3 , September 1994 , pp. 450 - 456
Copyright
Copyright © 1994 by the Weed Science Society of America 

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