International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
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Herbicide Resistant Weeds in Ontario, Canada.
#YearSpeciesSite of ActionActivesContacts
1 307Wild Carrot1957Daucus carota
Wild Carrot
Canada
(Ontario)
OntarioOntario Auxin Mimics (O/4) Auxin Mimics (O/4) 2,4-D Clarence Swanton, Chris Hall
2 58Common Lambsquarters1973Chenopodium album
Common Lambsquarters
Canada
(Ontario)
OntarioOntario PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Clarence Swanton
3 59Common Ragweed1976Ambrosia artemisiifolia
Common Ragweed
Canada
(Ontario)
OntarioOntario PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Clarence Swanton
4 60Lateflowering Goosefoot1976Chenopodium album var. striatum (=C. strictum var. glaucophyllum)
Lateflowering Goosefoot
Canada
(Ontario)
OntarioOntario PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Clarence Swanton
5 1158Powell Amaranth1977Amaranthus powellii
Powell Amaranth
Canada
(Ontario)
Ontario  PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine, metribuzin Francois Tardif, Clarence Swanton
6 5066Common Groundsel1977Senecio vulgaris
Common Groundsel
Canada
(Ontario)
OntarioOntario PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Hugh Beckie
7 61Redroot Pigweed1980Amaranthus retroflexus
Redroot Pigweed
Canada
(Ontario)
OntarioOntario PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Clarence Swanton
8 62Barnyardgrass1981Echinochloa crus-galli var. crus-galli
Barnyardgrass
Canada
(Ontario)
OntarioOntario PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Clarence Swanton
9 63Witchgrass1981Panicum capillare
Witchgrass
Canada
(Ontario)
OntarioOntario PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Clarence Swanton
10 64Yellow Foxtail1981Setaria pumila (=S. glauca)
Yellow Foxtail
Canada
(Ontario)
OntarioOntario PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Clarence Swanton
11 5065Wild Mustard1983Sinapis arvensis
Wild Mustard
Canada
(Ontario)
OntarioOntario PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine Hugh Beckie
12 48Horseweed1993Conyza canadensis
Horseweed
Canada
(Ontario)
OntarioOntario PS I Electron Diversion (D/22) PS I Electron Diversion (D/22) paraquat Susan Weaver
13 49Virginia Pepperweed1993Lepidium virginicum
Virginia Pepperweed
Canada
(Ontario)
OntarioOntario PS I Electron Diversion (D/22) PS I Electron Diversion (D/22) paraquat Susan Weaver
14 5049Powell Amaranth1998Amaranthus powellii
Powell Amaranth
Canada
(Ontario)
OntarioOntario Inhibition of Acetolactate Synthase (B/2), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
atrazine, imazethapyr, metribuzin Francois Tardif
15 1159Powell Amaranth1998Amaranthus powellii
Powell Amaranth
Canada
(Ontario)
OntarioOntario Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazethapyr, thifensulfuron-methyl Francois Tardif
16 1161Redroot Pigweed1998Amaranthus retroflexus
Redroot Pigweed
Canada
(Ontario)
OntarioOntario Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazethapyr, thifensulfuron-methyl Francois Tardif
17 5048Powell Amaranth1999Amaranthus powellii
Powell Amaranth
Canada
(Ontario)
Ontario  PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) atrazine, linuron, monolinuron, prometryne Francois Tardif
18 5471Common Ragweed2000Ambrosia artemisiifolia
Common Ragweed
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) chlorimuron-ethyl, cloransulam-methyl, imazethapyr Francois Tardif
19 5211Eastern Black Nightshade2000Solanum ptycanthum
Eastern Black Nightshade
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) flumetsulam, imazamox, imazethapyr, nicosulfuron, primisulfuron-methyl, prosulfuron, rimsulfuron Francois Tardif, Jamshid Ashigh
20 5123Common Lambsquarters2001Chenopodium album
Common Lambsquarters
Canada
(Ontario)
OntarioOntario Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) thifensulfuron-methyl Francois Tardif
21 5124Green Foxtail2001Setaria viridis
Green Foxtail
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) flucarbazone-Na, imazethapyr, nicosulfuron, pyrithiobac-sodium Francois Tardif
22 5125Redroot Pigweed2001Amaranthus retroflexus
Redroot Pigweed
Canada
(Ontario)
Ontario  PSII inhibitors - Serine 264 Binders (C1 C2/5) PSII inhibitors - Serine 264 Binders (C1 C2/5) linuron Francois Tardif
23 5212Tall Waterhemp2002Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
atrazine, imazethapyr Francois Tardif
24 5213Tall Waterhemp2002Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazethapyr Francois Tardif
25 5210Giant Foxtail2003Setaria faberi
Giant Foxtail
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2) Inhibition of Acetolactate Synthase (B/2) imazethapyr Francois Tardif
26 5472Smooth Pigweed2004Amaranthus hybridus (syn: quitensis)
Smooth Pigweed
Canada
(Ontario)
Ontario  PSII inhibitors - Histidine 215 Binders (C3/6) PSII inhibitors - Histidine 215 Binders (C3/6) bentazon, bromoxynil Francois Tardif
27 5473Redroot Pigweed2005Amaranthus retroflexus
Redroot Pigweed
Canada
(Ontario)
Ontario  PSII inhibitors - Histidine 215 Binders (C3/6) PSII inhibitors - Histidine 215 Binders (C3/6) bentazon, bromoxynil Francois Tardif
28 5483Giant Ragweed2008Ambrosia trifida
Giant Ragweed
Canada
(Ontario)
Ontario  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Francois Tardif
29 5493Eastern Black Nightshade2009Solanum ptycanthum
Eastern Black Nightshade
Canada
(Ontario)
Ontario  PS I Electron Diversion (D/22) PS I Electron Diversion (D/22) paraquat Francois Tardif, Kristen Obeid
30 5665Horseweed2010Conyza canadensis
Horseweed
Canada
(Ontario)
Ontario  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Francois Tardif
31 5666Horseweed2011Conyza canadensis
Horseweed
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
cloransulam-methyl, glyphosate Francois Tardif
32 5678Large Crabgrass2011Digitaria sanguinalis
Large Crabgrass
Canada
(Ontario)
Ontario  Inhibition of Acetyl CoA Carboxylase (A/1) Inhibition of Acetyl CoA Carboxylase (A/1) clethodim, fenoxaprop-ethyl, fluazifop-butyl, quizalofop-ethyl, sethoxydim Francois Tardif, Kristen Obeid, Martin Laforest, Brahim Soufiane, Robert Nurse, Eric Page, Marie-Josée Simard
33 7833Giant Ragweed2011Ambrosia trifida
Giant Ragweed
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
cloransulam-methyl, glyphosate Francois Tardif
34 5713Common Ragweed2012Ambrosia artemisiifolia
Common Ragweed
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
chlorimuron-ethyl, cloransulam-methyl, glyphosate, imazamethabenz-methyl Francois Tardif
35 9940Tall Waterhemp2014Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
glyphosate, imazethapyr Peter Sikkema
36 17141Tall Waterhemp2017Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 3 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
atrazine, glyphosate, imazethapyr Peter Sikkema
37 17142Tall Waterhemp2017Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
Canada
(Ontario)
Ontario  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 2 Sites of Action
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
atrazine, glyphosate, metribuzin Peter Sikkema
38 17140Tall Waterhemp2017Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9), Inhibition of Protoporphyrinogen Oxidase (E/14), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 4 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
Inhibition of Protoporphyrinogen Oxidase (E/14)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
atrazine, glyphosate, imazethapyr, lactofen Peter Sikkema
39 24243Powell Amaranth2019Amaranthus powellii
Powell Amaranth
Canada
(Ontario)
Ontario  Auxin Mimics (O/4), Inhibition of Acetolactate Synthase (B/2) Multiple Resistance: 2 Sites of Action
Auxin Mimics (O/4)
Inhibition of Acetolactate Synthase (B/2)
aminocyclopyrachlor, dichlorprop, imazethapyr, MCPA, mecoprop Francois Tardif, Peter Sikkema, Martin Laforest, Darren Robinson, Nader Soltani, Isabelle Aicklen
40 24242Tall Waterhemp2021Amaranthus tuberculatus (=A. rudis)
Tall Waterhemp
Canada
(Ontario)
Ontario  Inhibition of Acetolactate Synthase (B/2), Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9), Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27), Inhibition of Protoporphyrinogen Oxidase (E/14), PSII inhibitors - Serine 264 Binders (C1 C2/5) Multiple Resistance: 5 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
Inhibition of Hydroxyphenyl Pyruvate Dioxygenase (F2/27)
Inhibition of Protoporphyrinogen Oxidase (E/14)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
atrazine, glyphosate, imazethapyr, lactofen, mesotrione, metribuzin Peter Sikkema, Nader Soltani
41 22236Italian Ryegrass2021Lolium perenne ssp. multiflorum
Italian Ryegrass
Canada
(Ontario)
Ontario  Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9) glyphosate Kristen Obeid, Peter Sikkema, Melanie Filotas
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Thursday, November 21, 2024 .  Available  www.weedscience.org
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