INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Herbicide Resistant California Arrowhead Globally
(Sagittaria montevidensis)
Herbicide Resistant California Arrowhead Globally
(Sagittaria montevidensis)
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Herbicide Resistant California Arrowhead Globally
(Sagittaria montevidensis)
#CountryFirstYearSituationActive IngredientsSite of Action
1 Australia (New South Wales ) AustraliaNew South Wales 1994 Rice bensulfuron-methyl 1 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		146Sagittaria montevidensisCalifornia Arrowhead7
2 BrazilBrazil 1999 Rice bispyribac-sodium, cyclosulfamuron, ethoxysulfuron, metsulfuron-methyl, and pyrazosulfuron-ethyl 5 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		146Sagittaria montevidensisCalifornia Arrowhead1179
3 BrazilBrazil 2009 Rice bentazon, bispyribac-sodium, ethoxysulfuron, imazethapyr, metsulfuron-methyl, penoxsulam, and pyrazosulfuron-ethyl 5 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
PSII inhibitors - Histidine 215 Binders HRAC Group 6 (Legacy C3)
 		146Sagittaria montevidensisCalifornia Arrowhead5588
4 BrazilBrazil 2023 Rice florpyrauxifen 5 Auxin Mimics HRAC Group 4 (Legacy O)
 		146Sagittaria montevidensisCalifornia Arrowhead26264
5 ChinaChina 2003 Rice bensulfuron-methyl, and pyrazosulfuron-ethyl 9 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		146Sagittaria montevidensisCalifornia Arrowhead5303
6 United States (California) United StatesCalifornia1993 Rice bensulfuron-methyl 45 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		146Sagittaria montevidensisCalifornia Arrowhead390
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