International Survey of Herbicide-Resistant Weeds

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Herbicide Resistant Weeds in Argentina
Herbicide Resistant Weeds in Argentina
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Herbicide Resistant Weeds in Argentina
#SpeciesCommon NameFirst YearSite of Action
1 Amaranthus hybridus (syn: quitensis)Smooth PigweedArgentina 199648 Inhibition of Acetolactate Synthase (B/2)
 		5099
2 Sorghum halepenseJohnsongrassArgentina 200548 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5271
3 Lolium perenne ssp. multiflorumItalian RyegrassArgentina 200748 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5352
4 Lolium perennePerennial RyegrassArgentina 200848 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5487
5 Cynodon hirsutusGramilla mansaArgentina 200848 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5618
6 Raphanus sativusRadishArgentina 200848 Inhibition of Acetolactate Synthase (B/2)
 		6738
7 Echinochloa colonaJunglericeArgentina 200948 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5544
8 Lolium perenne ssp. multiflorumItalian RyegrassArgentina 200948 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5586
9 Avena fatuaWild OatArgentina 201048 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5587
10 Lolium perenne ssp. multiflorumItalian RyegrassArgentina 201048 Multiple Resistance: 3 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5599
11 Eleusine indicaGoosegrassArgentina 201248 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5701
12 Conyza bonariensisHairy FleabaneArgentina 201248 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		17100
13 Brassica rapa (=B. campestris)Birdsrape MustardArgentina 201248 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		17120
14 Amaranthus hybridus (syn: quitensis)Smooth PigweedArgentina 201348 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		6757
15 Hirschfeldia incanaShortpod MustardArgentina 201348 Inhibition of Acetolactate Synthase (B/2)
 		11008
16 Amaranthus hybridus (syn: quitensis)Smooth PigweedArgentina 201448 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		9948
17 Digitaria insularisSourgrassArgentina 201448 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		13049
18 Eleusine indicaGoosegrassArgentina 201448 Inhibition of Acetyl CoA Carboxylase (A/1)
 		31278
19 Conyza sumatrensisSumatran FleabaneArgentina 201448 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		32270
20 Sorghum halepenseJohnsongrassArgentina 201548 Inhibition of Acetyl CoA Carboxylase (A/1)
 		10979
21 Sorghum halepenseJohnsongrassArgentina 201548 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		10991
22 Amaranthus palmeriPalmer AmaranthArgentina 201548 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		13038
23 Brassica rapa (=B. campestris)Birdsrape MustardArgentina 201548 Auxin Mimics (O/4)
 		18175
24 Hirschfeldia incanaShortpod MustardArgentina 201648 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Auxin Mimics (O/4)
 		17103
25 Amaranthus hybridus (syn: quitensis)Smooth PigweedArgentina 201648 Multiple Resistance: 2 Sites of Action
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
Auxin Mimics (O/4)
 		17107
26 Amaranthus hybridus (syn: quitensis)Smooth PigweedArgentina 201648 Auxin Mimics (O/4)
 		17108
27 Echinochloa oryzoidesEarly WatergrassArgentina 201648 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		25261
28 Bromus catharticusRescuegrassArgentina 201748 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		17144
29 Urochloa panicoidesLiverseedgrassArgentina 201748 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		18158
30 Oryza sativa var. sylvaticaRed RiceArgentina 201848 Inhibition of Acetolactate Synthase (B/2)
 		27289
31 Rapistrum rugosumTurnipweedArgentina 201848 Inhibition of Acetolactate Synthase (B/2)
 		31273
32 Carduus acanthoidesPlumeless ThistleArgentina 201948 Multiple Resistance: 2 Sites of Action
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
Auxin Mimics (O/4)
 		18173
33 Echinochloa crus-galli var. crus-galliBarnyardgrassArgentina 201948 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		18183
34 Salsola tragusRussian-thistleArgentina 201948 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		19218
35 Digitaria sanguinalisLarge CrabgrassArgentina 201948 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		23239
36 Amaranthus hybridus (syn: quitensis)Smooth PigweedArgentina 202148 Inhibition of Protoporphyrinogen Oxidase (E/14)
 		23243
37 Kochia scopariaKochiaArgentina 202348 Inhibition of Acetolactate Synthase (B/2)
 		31277
38 Amaranthus palmeriPalmer AmaranthArgentina 202548 Inhibition of Protoporphyrinogen Oxidase (E/14)
 		31274
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Monday, November 3, 2025 .  Available  www.weedscience.org
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