select Select by Site of Action - (Inhibition of dihydroorotate dehydrogenase (DHODH) ) A (Inhibition of Acetyl CoA Carboxylase ) B (Inhibition of Acetolactate Synthase ) C1 (PSII inhibitors - Serine 264 Binders ) C1 C2 (PSII inhibitors - Serine 264 Binders ) C3 (PSII inhibitors - Histidine 215 Binders ) D (PS I Electron Diversion ) E (Inhibition of Protoporphyrinogen Oxidase ) F1 (Phytoene Desaturase inhibitors) F2 (Inhibition of Hydroxyphenyl Pyruvate Dioxygenase ) F3 (Inhibition of Lycopene Cyclase ) F4 (Inhibition of Deoxy-D-Xylulose Phosphate Synthase) G (Inhibition of Enolpyruvyl Shikimate Phosphate Synthase ) H (Inhibition of Glutamine Synthetase ) I (Inhibition of Dihydropteroate Synthase) K1 (Inhibition of Microtubule Assembly) K2 (Inhibition of Microtubule Organization ) K3 N (Very Long-Chain Fatty Acid Synthesis inhibitors) L (Inhibition of Cellulose Synthesis ) M (Uncouplers) N (Inhibition of Very Long-Chain Fatty Acid Synthesis ) O (Auxin Mimics ) P (Auxin Transport inhibitor) Q (Inhibition of Fatty Acid Thioesterase ) R (Inhibition of Serine-Threonine Protein Phosphatase ) S (Inhibition of Solanesyl Diphosphate Synthase ) T (Inhibition of Homogentisate Solanesyltransferase ) Z (Antimicrotubule mitotic disrupter) Z (Cell elongation inhibitors) Z (Nucleic acid inhibitors) Z (Unknown)

Weeds Resistant to Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27) by species and country
Weeds Resistant to Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27) by species and country Drag a column header and drop it here to group by that column

Weeds Resistant to Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27) by species and country

#	Species	Country	First Year	WeedID	Species	CommonName	HRAC	MOAID	WSSA	HerbicideGroup
1	Amaranthus palmeri Palmer Amaranth	2009 - United States (Kansas) *Multiple - 3 SOA's 2011 - United States (Nebraska) 2014 - United States (Nebraska) *Multiple - 2 SOA's 2014 - United States (Wisconsin) *Multiple - 2 SOA's 2015 - United States (Kansas) *Multiple - 5 SOA's 2016 - United States (North Carolina) 2021 - United States (Kansas) *Multiple - 6 SOA's 2022 - United States (Iowa) *Multiple - 4 SOA's	2009	14	Amaranthus palmeri	Palmer Amaranth	F2	10	27	Inhibition of Hydroxyphenyl Pyruvate Dioxygenase
2	Amaranthus retroflexus Redroot Pigweed	2022 - United States (North Carolina) *Multiple - 3 SOA's	2022	16	Amaranthus retroflexus	Redroot Pigweed	F2	10	27	Inhibition of Hydroxyphenyl Pyruvate Dioxygenase
3	Amaranthus tuberculatus (=A. rudis) Tall Waterhemp	2009 - United States (Illinois) *Multiple - 3 SOA's 2009 - United States (Iowa) *Multiple - 3 SOA's 2011 - United States (Iowa) *Multiple - 4 SOA's 2011 - United States (Nebraska) 2016 - United States (Illinois) *Multiple - 5 SOA's 2020 - United States (North Carolina) *Multiple - 5 SOA's 2021 - Canada (Ontario) *Multiple - 5 SOA's	2009	219	Amaranthus tuberculatus (=A. rudis)	Tall Waterhemp	F2	10	27	Inhibition of Hydroxyphenyl Pyruvate Dioxygenase
4	Leptochloa chinensis Chinese Sprangletop	2023 - China	2023	223	Leptochloa chinensis	Chinese Sprangletop	F2	10	27	Inhibition of Hydroxyphenyl Pyruvate Dioxygenase
5	Raphanus raphanistrum Wild Radish	2015 - Australia (Western Australia) *Multiple - 5 SOA's 2020 - Australia (Western Australia) *Multiple - 3 SOA's	2015	141	Raphanus raphanistrum	Wild Radish	F2	10	27	Inhibition of Hydroxyphenyl Pyruvate Dioxygenase

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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Sunday, July 6, 2025 .  Available  www.weedscience.org
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