INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Herbicide Resistant Wild Poinsettia Globally
(Euphorbia heterophylla)
Herbicide Resistant Wild Poinsettia Globally
(Euphorbia heterophylla)
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Herbicide Resistant Wild Poinsettia Globally
(Euphorbia heterophylla)
#CountryFirstYearSituationActive IngredientsSite of Action
1 BrazilBrazil 1993 Soybean chlorimuron-ethyl, cloransulam-methyl, imazamox, imazaquin, and imazethapyr 5 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		87Euphorbia heterophyllaWild Poinsettia5294
2 BrazilBrazil 2004 Corn (maize), and Soybean acifluorfen, cloransulam-methyl, diclosulam, flumetsulam, flumiclorac-pentyl, fomesafen, imazethapyr, lactofen, metsulfuron-methyl, nicosulfuron, and saflufenacil 5 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E)
 		87Euphorbia heterophyllaWild Poinsettia5215
3 BrazilBrazil 2019 Soybean glyphosate 5 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		87Euphorbia heterophyllaWild Poinsettia19213
4 EcuadorEcuador 1990 Corn (maize), and Soybean linuron 14 PSII inhibitors - Serine 264 Binders HRAC Group 5 (Legacy C1 C2)
 		87Euphorbia heterophyllaWild Poinsettia87
5 ParaguayParaguay 1995 Soybean imazethapyr 46 Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
 		87Euphorbia heterophyllaWild Poinsettia1162
6 ParaguayParaguay 2026 Soybean cloransulam-methyl, fomesafen, glyphosate, and imazethapyr 46 Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase HRAC Group 2 (Legacy B)
Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase HRAC Group 9 (Legacy G)
 		87Euphorbia heterophyllaWild Poinsettia35286
HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Sunday, October 4, 2026.  Available at  www.weedscience.org

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