INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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American Sloughgrass (Beckmannia syzigachne) is a monocot weed in the Poaceae family. In China this weed first evolved resistance to Group C2/7 herbicides in 1993 and infests Cereals, and Wheat. Group C2/7 herbicides are known as PSII inhibitor (Ureas and amides) (Inhibition of photosynthesis at photosystem II). Research has shown that these particular biotypes are resistant to chlorotoluron and they may be cross-resistant to other Group C2/7 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 | American Sloughgrass | Species | Beckmannia syzigachne | Group | PSII inhibitor (Ureas and amides) (C2/7) | Herbicides | chlorotoluron | Location | China | Year | 1993 | Situation(s) | Cereals, and Wheat | Contributors - (Alphabetically) | Heling Tu, and Tang-Hong Yuan | |
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| Field, Greenhouse, and Laboratory trials comparing a known susceptible American Sloughgrass biotype with this American Sloughgrass 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 C2/7 resistant American Sloughgrass 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 C2/7 resistant American Sloughgrass from China please update the database. |
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| Quinghai Academy Of Agricultural Science 464 Plant& Soil Sciences Building Xining, Qinghai China |
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| Shanghai Academy Of Agricultural Sciences Plant Protection Institute 26 No555 Shanghai, Qinghai China Email Tang-Hong Yuan |
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Drag a column header and drop it here to group by that column |
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1
| China | China | | 1993 |
Cereals, and Wheat
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chlorotoluron
| 9 |
PSII inhibitor (Ureas and amides) (C2/7)
| 31 | Beckmannia syzigachne | American Sloughgrass | 70 |
2
| China | China | | 2010 |
Winter wheat
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fenoxaprop-P-ethyl
| 9 |
ACCase inhibitors (A/1)
| 31 | Beckmannia syzigachne | American Sloughgrass | 5609 |
3
| Japan | Japan | | 2010 |
Spring Barley, and Wheat
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trifluralin
| 25 |
Microtubule inhibitors (K1/3)
| 31 | Beckmannia syzigachne | American Sloughgrass | 7768 |
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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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