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Patch Management of Herbicide-Resistant Wild Oat (Avena fatua)

Published online by Cambridge University Press:  20 January 2017

Hugh J. Beckie ,
Linda M. Hall  and
Barclay Schuba
Hugh J. Beckie*
Affiliation:
Saskatoon Research Centre, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK S7N 0X2, Canada
Linda M. Hall
Affiliation:
Alberta Agriculture, Food and Rural Development/University of Alberta, 410 Agriculture/Forestry Building, Edmonton, AB T6G 2P5, Canada
Barclay Schuba
Affiliation:
Prairie Farm Rehabilitation Administration, 102 McKendry Avenue West, Melfort, SK S0E 1A0, Canada
*
Corresponding author's E-mail: [email protected]
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Abstract

A study was conducted at a 64-ha site in western Canada to determine how preventing seed shed from herbicide-resistant wild oat affects patch expansion over a 6-yr period. Seed shed was prevented in two patches and allowed to occur in two patches (nontreated controls). Annual patch expansion was determined by seed bank sampling and mapping. Crop management practices were performed by the grower. Area of treated patches increased by 35% over the 6-yr period, whereas nontreated patches increased by 330%. Patch expansion was attributed mainly to natural seed dispersal (nontreated) or seed movement by equipment at time of seeding (nontreated and treated). Extensive seed shed from plants in nontreated patches before harvest or control of resistant plants by alternative herbicides minimized seed movement by the combine harvester. Although both treated and nontreated patches were relatively stable over time in this cropping system, preventing seed production and shed in herbicide-resistant wild oat patches can markedly slow the rate of patch expansion.

Keywords

Wild oat, Avena fatua L. # AVEFAGene flowherbicide resistanceintegrated weed managementseed bankseed shedseed spreadACCase, acetyl-CoA carboxylaseALS, acetolactate synthase
Type
Research Article
Information
Weed Technology , Volume 19 , Issue 3 , September 2005 , pp. 697 - 705
Copyright
Copyright © Weed Science Society of America 

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Footnotes

1 SRC contribution no. 1620.

References

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