INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
Foxtail Barley (Hordeum jubatum) is a monocot weed in the Poaceae family. In Alberta this weed first evolved resistance to Group 1 (Legacy A) herbicides in 2022 and infests Creeping Red Fescue. Group 1 (Legacy A) herbicides are known as Inhibition of Acetyl CoA Carboxylase
(Inhibition of Acetyl CoA Carboxylase
). Research has shown that these particular biotypes are resistant to quizalofop-ethyl and they may be cross-resistant to other Group 1 (Legacy A) herbicides.
The 'Group' letters/numbers that you see throughout this web site refer to the classification of herbicides by their site of action. To see a full list of herbicides and HRAC herbicide classifications click here.
|Inhibition of Acetyl CoA Carboxylase
HRAC Group 1 (Legacy A)
|Creeping Red Fescue
|Contributors - (Alphabetically)
|Greenhouse trials comparing a known susceptible Foxtail Barley biotype with this Foxtail Barley biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.
|Genetic studies on HRAC Group 1 resistant Foxtail Barley have not been reported to the site. There may be a note below or an article discussing the genetics of this biotype in the Fact Sheets and Other Literature
|The mechanism of resistance for this biotype is either unknown or has not been entered in the database. If you know anything about the mechanism of resistance for this biotype then please update the database.
|There is no record of differences in fitness or competitiveness of these resistant biotypes when compared to that of normal susceptible biotypes. If you have any information pertaining to the fitness of Group 1 (Legacy A) resistant Foxtail Barley from Alberta please update the database.
Agriculture and Agri-Food Canada
Weed Ecology and Cropping Systems
Science and Technology Branch
Lethbridge Research and Development Centre 5403 - 1st Avenue South Lethbridge
Lethbridge, T1J481, Alberta
Email Charles Geddes
|Drag a column header and drop it here to group by that column
Creeping Red Fescue
Inhibition of Acetyl CoA Carboxylase
( HRAC Group 1 (Legacy A)
PERMISSION MUST BE OBTAINED FIRST if you intend to base a significant portion of a scientific paper on data derived from this site. Citation:
Heap, I. The International Herbicide-Resistant Weed Database. Online.
Copyright © 1993-
WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.