International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP A/1 RESISTANT SHORTSPIKE CANARYGRASS
(Phalaris brachystachys)


ACCase inhibitors (A/1)

Syria
INTRODUCTION SHORTSPIKE CANARYGRASS
Shortspike Canarygrass (Phalaris brachystachys) is a monocot weed in the Poaceae family.  In Syria this weed first evolved resistance to Group A/1 herbicides in 2015 and infests Faba beans, Potatoes, and 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 Dec 18, 2016 )

Common NameShortspike Canarygrass
SpeciesPhalaris brachystachys
GroupACCase inhibitors (A/1)
Herbicidesclodinafop-propargyl, and fenoxaprop-P-ethyl
LocationSyria
Year2015
Situation(s)Faba beans, Potatoes, and Wheat
Contributors - (Alphabetically)Antoine Shomar 
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NOTES ABOUT THIS BIOTYPE

GENERAL

Antoine Shomar

In: Agriculture & Forestry, Vol. 62 Issue 1: 117-124, 2015, Podgorica
DOI: 10.17707/AgricultForest.62.1.14

IDENTIFYING SOME HERBICIDE RESISTANT GRASSES, MONITORING THEIR NATURE AND DISTRIBUTION IN SOUTHWESTERN PART OF ALEPPO CITY, SYRIA

It is common to say that weeds in Syria have developed resistance to herbicides, but this needs to be confirmed by research studies which are rare in the area. This study is run to describe and diagnose those weeds, and to monitor their nature and allocate their distribution in the Quaik river area in the southwestern part of Aleppo city in Syria. Seeds of suspected resistant grasses have been collected during the 2010 summer from Al-Eis, Al-Hadher and Banes, which were theoretically identified as resistant biotype to (ACCase) herbicides. In addition to seeds of grasses collected from ICARDA Tel Hadya station which were expected as sensitive biotype, taking into account that the seeds were preserved properly for the 2011/2012 season. In this experiment four herbicides have been used, two ACCase inhibitors, Ralon super (fenoxaprop-p-ethyl) and Topik (clodinafobpropargyl), the other two ALS inhibitors, Atlantis (mesosulfuron + iodosulfuron) and Pallas (pyroxsulam). The results showed that, the short spike canarygrass (Phalaris brachystachys L.) was the most risky in this area which have developed resistance to the (ACCase) in all locations including Tel Hadya station, the hood canarygrass (Phalaris paradoxa L.) came second in its resistance shown to the (ACCase) at all locations except Tel Hadya station. The wild oat (Avena fatua L.) came third, the results shown developed resistance to the (ACCase) in two locations Al-Hadher and Banes, sensitive in Tel Hadya station, while the results at Al-Eis were uncertain.

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ACADEMIC ASPECTS

Confirmation Tests

Greenhouse trials comparing a known susceptible Shortspike Canarygrass biotype with this Shortspike Canarygrass 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 Shortspike Canarygrass 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 Group A/1 resistant Shortspike Canarygrass from Syria please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

ANTOINE SHOMAR
Weed Scientist
International Center for Agricultural Research in the Dry Areas (ICARDA)
Area 4, Ebn Tufail Avenue
Aleppo, Aleppo
Syria
Email Antoine Shomar

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Syria have been instrumental in providing you this information. Particular thanks is given to Antoine Shomar for providing detailed information.
Herbicide Resistant Shortspike Canarygrass Globally
(Phalaris brachystachys)
Herbicide Resistant Shortspike Canarygrass Globally
(Phalaris brachystachys)
Drag a column header and drop it here to group by that column
Herbicide Resistant Shortspike Canarygrass Globally
(Phalaris brachystachys)
#CountryFirstYearSituationActive IngredientsSite of Action
1 IranIran 2014 Winter wheat clodinafop-propargyl, diclofop-methyl, fenoxaprop-P-ethyl, and haloxyfop-methyl 79 ACCase inhibitors (A/1)
244Phalaris brachystachysShortspike Canarygrass10951
2 ItalyItaly 2001 Durum wheat, and Sugar beets clodinafop-propargyl, diclofop-methyl, pinoxaden, and sethoxydim 24 ACCase inhibitors (A/1)
244Phalaris brachystachysShortspike Canarygrass5615
3 SyriaSyria 2015 Faba beans, Potatoes, and Wheat clodinafop-propargyl, and fenoxaprop-P-ethyl 69 ACCase inhibitors (A/1)
244Phalaris brachystachysShortspike Canarygrass15058
4 TurkeyTurkey 2008 Wheat clodinafop-propargyl, and pyroxsulam 71 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
244Phalaris brachystachysShortspike Canarygrass5398
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