INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Russian-thistle (Salsola tragus) is a dicot weed in the Chenopodiaceae family. In Saskatchewan this weed first evolved resistance to Group B/2 herbicides in 1989 and infests Wheat. Group B/2 herbicides are known as ALS inhibitors (Inhibition of Acetolactate Synthase
). Research has shown that these particular biotypes are resistant to chlorsulfuron and they may be cross-resistant to other Group B/2 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 | ALS inhibitors (B/2) | Herbicides | chlorsulfuron | Location | Canada, Saskatchewan | Year | 1989 | Situation(s) | Wheat | Contributors - (Alphabetically) | Hugh Beckie | |
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| Hugh Beckie | Morrison, I. N. and M. D. Devine. 1994. Herbicide resistance in the Canadian prairie provinces: five years after the fact. Phytoprotection 75(Suppl.):5-16.
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| Greenhouse 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 Group B/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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| 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. |
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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 B/2 resistant Russian-thistle from Saskatchewan please update the database. |
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| Research Scientist Agriculture & Agri-Food Canada, Science & Technology Branch Herbicide-Resistant & Novel-Trait Plants 107 Science Place Saskatoon, S7N 0X2, Saskatchewan Canada Email Hugh Beckie |
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1
| Argentina | Argentina | | 2019 |
Soybean
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glyphosate
| 48 |
EPSP synthase inhibitors (G/9)
| 147 | Salsola tragus | Russian-thistle | 19218 |
2
| Canada (Saskatchewan) | Canada | Saskatchewan | 1989 |
Wheat
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chlorsulfuron
| 7 |
ALS inhibitors (B/2)
| 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 |
ALS inhibitors (B/2)
| 147 | Salsola tragus | Russian-thistle | 7831 |
4
| United States (Washington) | United States | Washington | 1987 |
Wheat
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chlorsulfuron
| 45 |
ALS inhibitors (B/2)
| 147 | Salsola tragus | Russian-thistle | 231 |
5
| United States (Montana) | United States | Montana | 1987 |
Cropland, and Wheat
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chlorsulfuron
| 45 |
ALS inhibitors (B/2)
| 147 | Salsola tragus | Russian-thistle | 411 |
6
| United States (Idaho) | United States | Idaho | 1990 |
Wheat
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chlorsulfuron
| 45 |
ALS inhibitors (B/2)
| 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 |
ALS inhibitors (B/2)
| 147 | Salsola tragus | Russian-thistle | 1173 |
8
| United States (California) | United States | California | 1994 |
Roadsides
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chlorsulfuron, and sulfometuron-methyl
| 45 |
ALS inhibitors (B/2)
| 147 | Salsola tragus | Russian-thistle | 1036 |
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| United States (Montana) | United States | Montana | 2015 |
Fallow, and Wheat
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glyphosate
| 45 |
EPSP synthase inhibitors (G/9)
| 147 | Salsola tragus | Russian-thistle | 12032 |
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| United States (Washington) | United States | Washington | 2015 |
Fallow
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glyphosate
| 45 |
EPSP synthase inhibitors (G/9)
| 147 | Salsola tragus | Russian-thistle | 18160 |
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| United States (Oregon) | United States | Oregon | 2016 |
Fallow
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glyphosate
| 45 |
EPSP synthase inhibitors (G/9)
| 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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