International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
(Echium plantagineum)

ALS inhibitors (B/2)

Brazil, Rio Grande du Sol
Patersons Curse (Echium plantagineum) is a dicot weed in the Boraginaceae family.  In Brazil this weed first evolved resistance to Group B/2 herbicides in 2015 and infests Cereals, and Wheat.   Group B/2 herbicides are known as ALS inhibitors (Inhibition of acetolactate synthase ALS (acetohydroxyacid synthase AHAS)).  Research has shown that these particular biotypes are resistant to metsulfuron-methyl and they may be cross-resistant to other Group B/2 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.

If we do not have a picture for this weed, or you can provide a better picture (scan, digital camera etc) please please e-mail it to us.

QUIK STATS (last updated Apr 18, 2016 )

Common NamePatersons Curse
SpeciesEchium plantagineum
GroupALS inhibitors (B/2)
LocationBrazil, Rio Grande du Sol
Situation(s)Cereals, and Wheat
Contributors - (Alphabetically)Mauro Rizzardi, and Sabrina Tolotti Peruzzo 
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Confirmation Tests

Greenhouse, and Laboratory trials comparing a known susceptible Patersons Curse biotype with this Patersons Curse biotype have been used to confirm resistance. For further information on the tests conducted please contact the local weed scientists that provided this information.

Genetic studies on Group B/2 resistant Patersons Curse 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 B/2 resistant Patersons Curse from Brazil please update the database.
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Universidade De Passo Fundo
Crop Science
3713 Whispering Lane
Passo Fundo, 99010110, Rio Grande Do Sul
Email Mauro Rizzardi
Graduate Student
Universidade De Passo Fundo
Crop Science
Avenida Brazil 894
Passo Fundo, 99025003, Rio Grande do Sul
Email Sabrina Tolotti Peruzzo


The Herbicide Resistance Action Committee, The Weed Science Society of America, and weed scientists in Brazil have been instrumental in providing you this information. Particular thanks is given to Mauro Rizzardi, and Sabrina Tolotti Peruzzo for providing detailed information.
Herbicide Resistant Patersons Curse Globally
(Echium plantagineum)
Herbicide Resistant Patersons Curse Globally
(Echium plantagineum)
Drag a column header and drop it here to group by that column
Herbicide Resistant Patersons Curse Globally
(Echium plantagineum)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (South Australia) AustraliaSouth Australia1997 Cereals, and Pastures chlorsulfuron, and metosulam 1 ALS inhibitors (B/2)
186Echium plantagineumPatersons Curse1136
2 Australia (Western Australia) AustraliaWestern Australia1997 Cereals chlorsulfuron 1 ALS inhibitors (B/2)
186Echium plantagineumPatersons Curse5030
3 BrazilBrazil 2015 Cereals, and Wheat metsulfuron-methyl 5 ALS inhibitors (B/2)
186Echium plantagineumPatersons Curse12033
Literature about Similar Cases

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Friday, March 23, 2018 .  Available
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