INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Herbicide Resistant Roughstalk Bluegrass Globally
(Poa trivialis)
Herbicide Resistant Roughstalk Bluegrass Globally
(Poa trivialis)
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Herbicide Resistant Roughstalk Bluegrass Globally
(Poa trivialis)
#CountryFirstYearSituationActive IngredientsSite of Action
1 FranceFrance 2012 Wheat iodosulfuron-methyl-Na, and mesosulfuron-methyl 17 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		350Poa trivialisRoughstalk Bluegrass18179
2 IrelandIreland 2023 Wheat iodosulfuron-methyl-Na, mesosulfuron-methyl, and propoxycarbazone-Na 81 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		350Poa trivialisRoughstalk Bluegrass31279
HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Sunday, October 18, 2026.  Available at  www.weedscience.org

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