INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Herbicide Resistant Early Watergrass Globally
(Echinochloa oryzoides)
Herbicide Resistant Early Watergrass Globally
(Echinochloa oryzoides)
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Herbicide Resistant Early Watergrass Globally
(Echinochloa oryzoides)
#CountryFirstYearSituationActive IngredientsSite of Action
1 ArgentinaArgentina 2016 Corn (maize), Rice, Roadsides, and Soybean glyphosate 48 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		261Echinochloa oryzoidesEarly Watergrass25261
2 TurkeyTurkey 2009 Rice bispyribac-sodium, cyhalofop-butyl, and penoxsulam 71 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase HRAC Group 1 (Legacy A)
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		261Echinochloa oryzoidesEarly Watergrass5530
3 United States (California) United StatesCalifornia2000 Rice molinate, and thiobencarb/benthiocarb 45 Very Long-Chain Fatty Acid Synthesis inhibitorsHRAC Group 15 (Legacy K3 N)
 		261Echinochloa oryzoidesEarly Watergrass5492
HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Sunday, October 4, 2026.  Available at  www.weedscience.org

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