INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Russian-thistle (Salsola tragus) is a dicot weed in the Chenopodiaceae family. In Oregon this weed first evolved resistance to Group 2 (Legacy B) herbicides in 1993 and infests Wheat. Group 2 (Legacy B) herbicides are known as Inhibition of Acetolactate Synthase
(Inhibition of Acetolactate Synthase
). Research has shown that these particular biotypes are resistant to chlorsulfuron, metsulfuron-methyl, and triasulfuron and they may be cross-resistant to other Group 2 (Legacy B) 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.
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Common Name | Russian-thistle | Species | Salsola tragus | Group | Inhibition of Acetolactate Synthase
HRAC Group 2 (Legacy B)
| Herbicides | chlorsulfuron, metsulfuron-methyl, and triasulfuron | Location | United States, Oregon | Year | 1993 | Situation(s) | Wheat | Contributors - (Alphabetically) | Daniel Ball | |
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| Daniel Ball | Resistance was confirmed in 1993 in a cooperative survey conducted by Oregon State University and DuPont Inc.
Live plant samples were sent to an independent testing facility and the presence of an altered ALS enzyme confirmed. Remains susceptible to 2,4-D, dicamba and glyphosate.Edit this Note | Add New Note |
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| Laboratory trials comparing a known susceptible Russian-thistle biotype with this Russian-thistle biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information. |
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| Genetic studies on HRAC Group 2 resistant Russian-thistle 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 |
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| Studies on the mechanism of resistance of Group 2 (Legacy B) resistant Russian-thistle from Oregon indicate that resistance is due to an altered target site. There may be a note below or an article discussing the mechanism of resistance in the Fact Sheets and Other Literature |
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| 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 2 (Legacy B) resistant Russian-thistle from Oregon please update the database. |
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| Professor Of Weed Science Oregon State University Columbia Basin Agricultural Research Center 48037 Tubbs Ranch Road P. O. Box 370 Pendleton, 97801, Oregon United States Email Daniel Ball Web : Web Site Link |
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Drag a column header and drop it here to group by that column |
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1
| Argentina | Argentina | | 2019 |
Soybean
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glyphosate
| 48 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 147 | Salsola tragus | Russian-thistle | 19218 |
2
| Canada (Saskatchewan) | Canada | Saskatchewan | 1989 |
Wheat
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chlorsulfuron
| 7 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 147 | Salsola tragus | Russian-thistle | 5067 |
3
| Canada (Alberta) | Canada | Alberta | 2007 |
Spring Barley, and Wheat
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thifensulfuron-methyl, and tribenuron-methyl
| 7 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 147 | Salsola tragus | Russian-thistle | 7831 |
4
| United States (Washington) | United States | Washington | 1987 |
Wheat
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chlorsulfuron
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 147 | Salsola tragus | Russian-thistle | 231 |
5
| United States (Montana) | United States | Montana | 1987 |
Cropland, and Wheat
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chlorsulfuron
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 147 | Salsola tragus | Russian-thistle | 411 |
6
| United States (Idaho) | United States | Idaho | 1990 |
Wheat
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chlorsulfuron
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 147 | Salsola tragus | Russian-thistle | 512 |
7
| United States (Oregon) | United States | Oregon | 1993 |
Wheat
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chlorsulfuron, metsulfuron-methyl, and triasulfuron
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 147 | Salsola tragus | Russian-thistle | 1173 |
8
| United States (California) | United States | California | 1994 |
Roadsides
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chlorsulfuron, and sulfometuron-methyl
| 45 |
Inhibition of Acetolactate Synthase
( HRAC Group 2 (Legacy B)
| 147 | Salsola tragus | Russian-thistle | 1036 |
9
| United States (Montana) | United States | Montana | 2015 |
Fallow, and Wheat
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glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 147 | Salsola tragus | Russian-thistle | 12032 |
10
| United States (Washington) | United States | Washington | 2015 |
Fallow
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glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 147 | Salsola tragus | Russian-thistle | 18160 |
11
| United States (Oregon) | United States | Oregon | 2016 |
Fallow
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glyphosate
| 45 |
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase
( HRAC Group 9 (Legacy G)
| 147 | Salsola tragus | Russian-thistle | 13055 |
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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.
. Available
www.weedscience.org
Copyright © 1993-
WeedScience.org All rights reserved. Fair use of this material is encouraged. Proper citation is requested.
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