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)

Italy
INTRODUCTION SHORTSPIKE CANARYGRASS
Shortspike Canarygrass (Phalaris brachystachys) is a monocot weed in the Poaceae family.  In Italy this weed first evolved resistance to Group A/1 herbicides in 2001 and infests Durum wheat, and Sugar beets.   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, diclofop-methyl, pinoxaden, and sethoxydim 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 Aug 07, 2012 )

Common NameShortspike Canarygrass
SpeciesPhalaris brachystachys
GroupACCase inhibitors (A/1)
Herbicidesclodinafop-propargyl, diclofop-methyl, pinoxaden, and sethoxydim
LocationItaly
Year2001
Situation(s)Durum wheat, and Sugar beets
Contributors - (Alphabetically)Alberto Collavo 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Alberto Collavo
Central and Southern Italy, expecially in Apulia Marche and Lazio.

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CROSS RESISTANCE

Alberto Collavo
The population collected in sugarbeet is cross-resistant to clodinafop, pinoxaden and sethoxydim while the ones collected in durum wheat are cross-resistant to tralkoxydim and diclofop. All population are controlled by ALS inhibitors.

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ACADEMIC ASPECTS

Confirmation Tests

Field, and 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 Italy please update the database.
 
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CONTRIBUTING WEED SCIENTISTS

ALBERTO COLLAVO
Post Doc
National Council for Research (CNR)
Institute Of Agro-Environmental And Forest Biology (IBAF)
Viale dell'Univeristà 16
Legnaro, 35020, Padova
Italy
Email Alberto Collavo
Web   : Web Site Link

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Italy have been instrumental in providing you this information. Particular thanks is given to Alberto Collavo 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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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Monday, May 22, 2017 .  Available  www.weedscience.org
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