INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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Weeds Resistant to Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E)
by species and country
Weeds Resistant to Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E)
by species and country
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Weeds Resistant to Inhibition of Protoporphyrinogen Oxidase HRAC Group 14 (Legacy E)
by species and country
#SpeciesCountryFirst Year
1 Acalypha australis
Asian Copperleaf 		2011 - China
2011280Acalypha australisAsian CopperleafE814Inhibition of Protoporphyrinogen Oxidase
2 Amaranthus hybridus (syn: quitensis)
Smooth Pigweed 		2005 - Bolivia
2021 - Argentina
200512Amaranthus hybridus (syn: quitensis)Smooth PigweedE814Inhibition of Protoporphyrinogen Oxidase
3 Amaranthus palmeri
Palmer Amaranth 		2011 - United States (Arkansas) *Multiple - 2 SOA's
2015 - United States (Tennessee) *Multiple - 2 SOA's
2016 - United States (Arkansas) *Multiple - 5 SOA's
2016 - United States (Illinois) *Multiple - 2 SOA's
2021 - United States (Kansas) *Multiple - 6 SOA's
2025 - Argentina
201114Amaranthus palmeriPalmer AmaranthE814Inhibition of Protoporphyrinogen Oxidase
4 Amaranthus retroflexus
Redroot Pigweed 		2014 - Brazil
2017 - China *Multiple - 2 SOA's
2020 - United States (North Carolina) *Multiple - 2 SOA's
2022 - United States (North Carolina) *Multiple - 3 SOA's
 		201416Amaranthus retroflexusRedroot PigweedE814Inhibition of Protoporphyrinogen Oxidase
5 Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp 		2001 - United States (Kansas) *Multiple - 2 SOA's
2002 - United States (Illinois) *Multiple - 3 SOA's
2005 - United States (Missouri) *Multiple - 3 SOA's
2009 - United States (Illinois) *Multiple - 4 SOA's
2009 - United States (Iowa)
2014 - United States (Indiana)
2014 - United States (Minnesota)
2016 - United States (Illinois) *Multiple - 5 SOA's
2016 - United States (Minnesota) *Multiple - 2 SOA's
2016 - United States (Nebraska) *Multiple - 4 SOA's
2016 - United States (Wisconsin) *Multiple - 2 SOA's
2017 - Canada (Ontario) *Multiple - 4 SOA's
2020 - United States (North Carolina) *Multiple - 5 SOA's
2021 - Canada (Ontario) *Multiple - 5 SOA's
 		2001219Amaranthus tuberculatus (=A. rudis)Tall WaterhempE814Inhibition of Protoporphyrinogen Oxidase
6 Ambrosia artemisiifolia
Common Ragweed 		2005 - United States (Delaware) *Multiple - 2 SOA's
2006 - United States (Ohio) *Multiple - 2 SOA's
2015 - United States (North Carolina) *Multiple - 3 SOA's
2016 - United States (Maryland) *Multiple - 3 SOA's
2016 - United States (Michigan) *Multiple - 2 SOA's
2016 - United States (New Jersey) *Multiple - 3 SOA's
2023 - Ukraine *Multiple - 2 SOA's
 		200518Ambrosia artemisiifoliaCommon RagweedE814Inhibition of Protoporphyrinogen Oxidase
7 Avena fatua
Wild Oat 		2015 - Canada (Manitoba) *Multiple - 4 SOA's
 		201528Avena fatuaWild OatE814Inhibition of Protoporphyrinogen Oxidase
8 Bidens pilosa
Hairy Beggarticks 		2022 - Brazil
202232Bidens pilosaHairy BeggarticksE814Inhibition of Protoporphyrinogen Oxidase
9 Conyza bonariensis
Hairy Fleabane 		2022 - Jordan *Multiple - 2 SOA's
 		202260Conyza bonariensisHairy FleabaneE814Inhibition of Protoporphyrinogen Oxidase
10 Conyza sumatrensis
Sumatran Fleabane 		2017 - Brazil
2017 - Brazil *Multiple - 5 SOA's
 		201765Conyza sumatrensisSumatran FleabaneE814Inhibition of Protoporphyrinogen Oxidase
11 Descurainia sophia
Flixweed 		2011 - China
2011237Descurainia sophiaFlixweedE814Inhibition of Protoporphyrinogen Oxidase
12 Eleusine indica
Goosegrass 		2015 - United States (North Carolina)
2015 - United States (Virginia)
201581Eleusine indicaGoosegrassE814Inhibition of Protoporphyrinogen Oxidase
13 Euphorbia heterophylla
Wild Poinsettia 		2004 - Brazil *Multiple - 2 SOA's
 		200487Euphorbia heterophyllaWild PoinsettiaE814Inhibition of Protoporphyrinogen Oxidase
14 Kochia scoparia
Kochia 		2021 - Canada (Saskatchewan)
2021101Kochia scopariaKochiaE814Inhibition of Protoporphyrinogen Oxidase
15 Lolium rigidum
Rigid Ryegrass 		2016 - Spain *Multiple - 2 SOA's
 		2016112Lolium rigidumRigid RyegrassE814Inhibition of Protoporphyrinogen Oxidase
16 Poa annua
Annual Bluegrass 		2017 - United States (Tennessee) *Multiple - 7 SOA's
 		2017130Poa annuaAnnual BluegrassE814Inhibition of Protoporphyrinogen Oxidase
17 Senecio vernalis
Eastern Groundsel 		2014 - Israel *Multiple - 4 SOA's
 		2014327Senecio vernalisEastern GroundselE814Inhibition of Protoporphyrinogen Oxidase
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