International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
GROUP C1/5 RESISTANT HOOD CANARYGRASS
(Phalaris paradoxa)


Photosystem II inhibitors (C1/5)

Israel
INTRODUCTION HOOD CANARYGRASS
Hood Canarygrass (Phalaris paradoxa) is a monocot weed in the Poaceae family.  In Israel this weed first evolved resistance to Group C1/5 herbicides in 1979 and infests Railways, and Roadsides.   Group C1/5 herbicides are known as Photosystem II inhibitors (Inhibition of photosynthesis at photosystem II).  Research has shown that these particular biotypes are resistant to atrazine and they may be cross-resistant to other Group C1/5 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 Sep 15, 2000 )

Common NameHood Canarygrass
SpeciesPhalaris paradoxa
GroupPhotosystem II inhibitors (C1/5)
Herbicidesatrazine
LocationIsrael
Year1979
Situation(s)Railways, and Roadsides
Contributors - (Alphabetically)Baruch Rubin 
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NOTES ABOUT THIS BIOTYPE

AREAS FOUND

Baruch Rubin
All over Israel.

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ACADEMIC ASPECTS

Confirmation Tests

Field, Greenhouse, and Laboratory trials comparing a known susceptible Hood Canarygrass biotype with this Hood 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 C1/5 resistant Hood 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

Triazine resistant weeds often exhibit a lower relative fitness when compared to susceptible biotypes.  The most common mutation conferring triazine resistance (Ser 264 to Gly mutation of the psbA gene) also causes a reduction in CO2 fixation, quantum yield, and seed and biomass production.  There is no record in this database referring specifically to fitness studies on Group C1/5 resistant Hood Canarygrass from Israel.
 
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CONTRIBUTING WEED SCIENTISTS

BARUCH RUBIN
Professor
Hebrew University Of Jerusalem
Inst. Plant Sci. & Genetics In Agriculture
Faculty Of Agric.
Food & Environm.
Rehovot, 76100, Israel
Israel
Email Baruch Rubin

ACKNOWLEDGEMENTS

The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Israel have been instrumental in providing you this information. Particular thanks is given to Baruch Rubin for providing detailed information.
Herbicide Resistant Hood Canarygrass Globally
(Phalaris paradoxa)
Herbicide Resistant Hood Canarygrass Globally
(Phalaris paradoxa)
Drag a column header and drop it here to group by that column
Herbicide Resistant Hood Canarygrass Globally
(Phalaris paradoxa)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (New South Wales ) AustraliaNew South Wales 1997 Wheat, and Winter pulses fenoxaprop-P-ethyl, and sethoxydim 1 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass1137
2 Australia (New South Wales ) AustraliaNew South Wales 2012 Spring Barley, and Wheat clodinafop-propargyl, and mesosulfuron-methyl 1 Multiple Resistance: 2 Sites of Action
ACCase inhibitors (A/1)
ALS inhibitors (B/2)
128Phalaris paradoxaHood Canarygrass7840
3 IranIran 2007 Winter wheat diclofop-methyl 79 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass5342
4 IsraelIsrael 1979 Railways, and Roadsides atrazine 23 Photosystem II inhibitors (C1/5)
128Phalaris paradoxaHood Canarygrass96
5 IsraelIsrael 2004 Peas, and Wheat clethodim, clodinafop-propargyl, cycloxydim, diclofop-methyl, fenoxaprop-P-ethyl, fluazifop-P-butyl, haloxyfop-P-methyl, and tralkoxydim 23 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass5299
6 ItalyItaly 1998 Wheat clodinafop-propargyl, diclofop-methyl, pinoxaden, and sethoxydim 24 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass5108
7 MexicoMexico 1996 Wheat clodinafop-propargyl, fenoxaprop-P-ethyl, pinoxaden, and tralkoxydim 29 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass5479
8 SyriaSyria 2015 Faba beans, Potatoes, and Wheat clodinafop-propargyl, and fenoxaprop-P-ethyl 69 ACCase inhibitors (A/1)
128Phalaris paradoxaHood Canarygrass15059
Literature about Similar Cases

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Wednesday, November 20, 2019 .  Available  www.weedscience.org
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