INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Herbicide Resistant Ricefield Bulrush Globally
(Schoenoplectus mucronatus (=Scirpus mucronatus))
Herbicide Resistant Ricefield Bulrush Globally
(Schoenoplectus mucronatus (=Scirpus mucronatus))
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Herbicide Resistant Ricefield Bulrush Globally
(Schoenoplectus mucronatus (=Scirpus mucronatus))
#CountryFirstYearSituationActive IngredientsSite of Action
1 ChileChile 2005 Rice bensulfuron-methyl, bispyribac-sodium, cyclosulfamuron, ethoxysulfuron, imazamox, and pyrazosulfuron-ethyl 8 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		182Schoenoplectus mucronatus (=Scirpus mucronatus)Ricefield Bulrush5396
2 ItalyItaly 1995 Rice azimsulfuron, bensulfuron-methyl, cinosulfuron, and ethoxysulfuron 24 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		182Schoenoplectus mucronatus (=Scirpus mucronatus)Ricefield Bulrush1129
3 United States (California) United StatesCalifornia1997 Rice bensulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		182Schoenoplectus mucronatus (=Scirpus mucronatus)Ricefield Bulrush1099
4 United States (California) United StatesCalifornia2014 Rice propanil 45 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		182Schoenoplectus mucronatus (=Scirpus mucronatus)Ricefield Bulrush9924
HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Sunday, October 4, 2026.  Available at  www.weedscience.org

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