International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
Most Recent Cases of Herbicide Resistant Weeds Entered into the Database
(click on a column header to sort or click on a country for details)
#Date Last UpdatedSpeciesCountryFirst YearSite of Action
1 April 23, 2013Amaranthus tuberculatus (syn. rudis)United States (Nebraska) 2012 Glycines (G/9)
2 April 10, 2013Amaranthus blitoidesUnited States (Michigan) 2012 Photosystem II inhibitors (C1/5)
3 April 10, 2013Amaranthus viridisBrazil2011 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
4 April 10, 2013Amaranthus retroflexusBrazil2011 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
5 April 10, 2013Amaranthus retroflexusBrazil2012 ALS inhibitors (B/2)
6 April 10, 2013Ranunculus acrisNew Zealand2012 ALS inhibitors (B/2)
7 April 10, 2013Solanum nigrumNew Zealand2009 Bipyridiliums (D/22)
8 April 10, 2013Solanum americanumNew Zealand2009 Bipyridiliums (D/22)
9 March 4, 2013Kochia scopariaUnited States (Colorado) 2012 Glycines (G/9)
10 February 17, 2013Ambrosia artemisiifoliaCanada (Ontario) 2012 Glycines (G/9)
11 February 13, 2013Sisymbrium orientaleAustralia (South Australia) 2011 Photosystem II inhibitors (C1/5)
12 March 18, 2013Kochia scopariaUnited States (Montana) 2012 Glycines (G/9)
13 January 17, 2013Conyza canadensisUnited States (Delaware) 2010 Multiple Resistance: 2 Sites of Action
ALS inhibitors (B/2)
Glycines (G/9)
14 January 17, 2013Lolium multiflorumUnited States (Delaware) 2012 ALS inhibitors (B/2)
15 February 9, 2013Stellaria mediaUnited States (Delaware) 2012 ALS inhibitors (B/2)
16 January 17, 2013Amaranthus palmeriUnited States (Delaware) 2012 Glycines (G/9)
17 February 9, 2013Echinochloa colonaIran2013 Photosystem II inhibitors (C1/5)
18 December 28, 2012Amaranthus palmeriUnited States (Kansas) 2009 Multiple Resistance: 3 Sites of Action
ALS inhibitors (B/2)
Photosystem II inhibitors (C1/5)
4-HPPD inhibitors (F2/27)
19 December 21, 2012Amaranthus palmeriUnited States (Kansas) 2011 Glycines (G/9)
20 December 19, 2012Erucaria hispanicaIsrael2012 ALS inhibitors (B/2)
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Wednesday, May 22, 2013 .  Available  www.weedscience.org
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