International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
MULTIPLE RESISTANT SHORTAWN FOXTAIL
(Alopecurus aequalis)


Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)

China, Jiangsu
INTRODUCTION SHORTAWN FOXTAIL
Shortawn Foxtail (Alopecurus aequalis) is a monocot weed in the Poaceae family.  In China this weed first evolved multiple resistance (to 2 herbicide sites of action) in 2014 and infests Wheat.  Multiple resistance has evolved to herbicides in the Groups A/1, and B/2.  These particular biotypes are known to have resistance to fenoxaprop-P-ethyl, flucarbazone-sodium, mesosulfuron-methyl, nicosulfuron, penoxsulam, pinoxaden, and quizalofop-P-ethyl and they may be cross-resistant to other herbicides in the Groups A/1, and B/2.

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 20, 2015 )

Common NameShortawn Foxtail
SpeciesAlopecurus aequalis
GroupACCase inhibitors (A/1)
ALS inhibitors (B/2)
Herbicidesfenoxaprop-P-ethyl, flucarbazone-sodium, mesosulfuron-methyl, nicosulfuron, penoxsulam, pinoxaden, and quizalofop-P-ethyl
LocationChina, Jiangsu
Year2014
Situation(s)Wheat
Contributors - (Alphabetically)Liyao Dong 
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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse, and Laboratory 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, B/1, 2 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

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.
 
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 multiple resistant Shortawn Foxtail from China please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

LIYAO DONG
Weed Scientist
Nanjing Agricultural University
Laboratory of Integrated Pest Management on Crops in East China
College of Plant Protection
Nanjing, 210095, Jiangsu
China
Email Liyao Dong

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 Liyao Dong 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
Literature about Similar Cases

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Thursday, September 21, 2017 .  Available  www.weedscience.org
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