INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Russian-thistle (Salsola tragus) is a dicot weed in the Chenopodiaceae family. In California this weed first evolved resistance to Group B/2 herbicides in 1994 and infests Roadsides. 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 sulfometuron-methyl 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, and sulfometuron-methyl | Location | United States, California | Year | 1994 | Situation(s) | Roadsides | Contributors - (Alphabetically) | Jodie Holt, and Timothy Prather | |
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| Timothy Prather | California department of transportation has use records - mapped out use records. Sampled from different sites. 3-9 application of chlorsuluron and metsulfuron. Interstate 5, Hwy 152, Hwy 205, Hwy 580, Hwy 99.Edit this Note | Add New Note |
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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 California please update the database. |
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| Professor and Associate Dean University of California Botany and Plant Sciences 900 University Drive Riverside, 92521, California United States Email Jodie Holt Web : Web Site Link |
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| Professor University Of Idaho Plant, Soil and Entomological Sciences 875 Perimeter Drive MS 2339 Agricultural Science Building Room 317 Moscow, 83844-2339, Idaho United States Email Timothy Prather 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 |
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 |
9
| 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 |
10
| 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 |
11
| 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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