International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP A/1 RESISTANT SHORTAWN FOXTAIL
(Alopecurus aequalis)


ACCase inhibitors (A/1)

China
INTRODUCTION SHORTAWN FOXTAIL
Shortawn Foxtail (Alopecurus aequalis) is a monocot weed in the Poaceae family.  In China this weed first evolved resistance to Group A/1 herbicides in 2010 and infests Wheat.   Group A/1 herbicides are known as ACCase inhibitors (Inhibition of acetyl CoA carboxylase (ACCase)).  Research has shown that these particular biotypes are resistant to clodinafop-propargyl, and fenoxaprop-P-ethyl and they may be cross-resistant to other Group A/1 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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QUIK STATS (last updated Jan 21, 2011 )

Common NameShortawn Foxtail
SpeciesAlopecurus aequalis
GroupACCase inhibitors (A/1)
Herbicidesclodinafop-propargyl, and fenoxaprop-P-ethyl
LocationChina
Year2010
Situation(s)Wheat
Contributors - (Alphabetically)Zhaohu Li, and Ibrahim Mohamed 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Shortawn Foxtail biotype with this Shortawn Foxtail biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.
 
Genetics

Genetic studies on Group A/1 resistant Shortawn Foxtail 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
 
Mechanism of Resistance

Studies on the mechanism of resistance of Group A/1 resistant Shortawn Foxtail from China 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
 
Relative Fitness

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 A/1 resistant Shortawn Foxtail from China please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

ZHAOHU LI
Professor
China Agricultural University
Department Of Agronomy
Plant Sciences
747 Road 9,
Beijign, 100094
China
Email Zhaohu Li
IBRAHIM MOHAMED
Graduate Student
China Agricultural University
Agronomy And Biotechnology Collage
Yumingyuanxilu No 2. Haidian
Beijing, China, 100094
China
Email Ibrahim Mohamed

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in China have been instrumental in providing you this information. Particular thanks is given to Zhaohu Li, and Ibrahim Mohamed for providing detailed information.
Herbicide Resistant Shortawn Foxtail Globally
(Alopecurus aequalis)
Herbicide Resistant Shortawn Foxtail Globally
(Alopecurus aequalis)
Drag a column header and drop it here to group by that column
Herbicide Resistant Shortawn Foxtail Globally
(Alopecurus aequalis)
#CountryFirstYearSituationActive IngredientsSite of Action
1 ChinaChina 2010 Wheat clodinafop-propargyl, and fenoxaprop-P-ethyl 9 ACCase inhibitors (A/1)
264Alopecurus aequalisShortawn Foxtail5524
2 ChinaChina 2014 Wheat fenoxaprop-P-ethyl, flucarbazone-sodium, mesosulfuron-methyl, nicosulfuron, penoxsulam, pinoxaden, and quizalofop-P-ethyl 9 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
264Alopecurus aequalisShortawn Foxtail10954
3 JapanJapan 2004 Spring Barley, and Wheat thifensulfuron-methyl, and trifluralin 25 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Microtubule inhibitors (K1/3)
264Alopecurus aequalisShortawn Foxtail5570
4 JapanJapan 2005 Wheat, and Winter barley trifluralin 25 Microtubule inhibitors (K1/3)
264Alopecurus aequalisShortawn Foxtail11018
5 JapanJapan 2006 Wheat thifensulfuron-methyl 25 ALS inhibitors (B/2)
264Alopecurus aequalisShortawn Foxtail11019
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Monday, August 21, 2017 .  Available  www.weedscience.org
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