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Nature, Occurrence, and Cost of Herbicide-Resistant Green Foxtail (Setaria viridis) Across Saskatchewan Ecoregions

Published online by Cambridge University Press:  12 June 2017

Hugh J. Beckie ,
A. Gordon Thomas  and
Anne Légère
Hugh J. Beckie
Affiliation:
Saskatoon Research Centre, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK, Canada S7N 0X2
A. Gordon Thomas
Affiliation:
Saskatoon Research Centre, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK, Canada S7N 0X2
Anne Légère
Affiliation:
Soils and Crops Research and Development Centre, Agriculture and Agri-Food Canada, 2560 Hochelaga Boulevard, Sainte-Foy, QC, Canada G1V 2J3
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Abstract

In Saskatchewan, a field survey was conducted in 1996 and a grain elevator survey in 1997 to determine the nature and occurrence of herbicide-resistant (HR) biotypes of green foxtail (Setaria viridis). Based on results of the field survey, one in every 20 fields (1 million ha) in Saskatchewan is estimated to have acetyl-CoA carboxylase (ACCase) inhibitor (Group 1)-HR green foxtail. Of the samples received from 30 grain elevators, 83% had Group 1 resistance. Similar to the field survey, incidence of aryloxyphenoxy propionate (AOPP) resistance was much higher than cyclohexanedione (CHD) resistance. Both surveys indicated relatively low incidence of dinitroaniline (Group 3) resistance or cross-resistance (Groups 1 and 3). Most alternative herbicides to control Group 1-HR green foxtail in broadleaf crops and cross-HR biotypes in cereal and broadleaf crops increase costs to the grower.

Keywords

Green foxtail, Setaria viridis (L.) Beauv. # SETVISurveysacetyl-CoA carboxylase (ACCase) inhibitorsdinitroanilineSETVIACCase, acetyl-CoA carboxylase (EC 6.4.1.2)AOPP, aryloxyphenoxy propionateCHD, cyclohexanedioneHR, herbicide-resistant
Type
Symposium
Information
Weed Technology , Volume 13 , Issue 3 , September 1999 , pp. 626 - 631
Copyright
Copyright © 1999 by the Weed Science Society of America 

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