International Survey of Herbicide-Resistant Weeds

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Herbicide Resistant Weeds in Italy
Herbicide Resistant Weeds in Italy
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Herbicide Resistant Weeds in Italy
#SpeciesCommon NameFirst YearSite of Action
1 Solanum nigrumBlack NightshadeItaly 197824 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		113
2 Amaranthus hybridus (syn: quitensis)Smooth PigweedItaly 197824 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		114
3 Chenopodium albumCommon LambsquartersItaly 198224 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		116
4 Avena sterilisSterile OatItaly 199224 Inhibition of Acetyl CoA Carboxylase (A/1)
 		1128
5 Alisma plantago-aquaticaCommon WaterplantainItaly 199424 Inhibition of Acetolactate Synthase (B/2)
 		1130
6 Schoenoplectus mucronatus (=Scirpus mucronatus)Ricefield BulrushItaly 199524 Inhibition of Acetolactate Synthase (B/2)
 		1129
7 Lolium perenne ssp. multiflorumItalian RyegrassItaly 199524 Inhibition of Acetyl CoA Carboxylase (A/1)
 		8906
8 Papaver rhoeasCorn PoppyItaly 199824 Inhibition of Acetolactate Synthase (B/2)
 		1140
9 Phalaris paradoxaHood CanarygrassItaly 199824 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5108
10 Papaver rhoeasCorn PoppyItaly 199824 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Auxin Mimics (O/4)
 		5679
11 Papaver rhoeasCorn PoppyItaly 199824 Auxin Mimics (O/4)
 		5680
12 Amaranthus retroflexusRedroot PigweedItaly 199924 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		5115
13 Cyperus difformisSmallflower Umbrella SedgeItaly 199924 Inhibition of Acetolactate Synthase (B/2)
 		5155
14 Echinochloa crus-galli var. crus-galliBarnyardgrassItaly 200024 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		5114
15 Phalaris brachystachysShortspike CanarygrassItaly 200124 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5615
16 Lolium perenne ssp. multiflorumItalian RyegrassItaly 200224 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
 		1134
17 Amaranthus retroflexusRedroot PigweedItaly 200324 Inhibition of Acetolactate Synthase (B/2)
 		5248
18 Echinochloa erectaPollacci BarnyardgrassItaly 200424 Multiple Resistance: 2 Sites of Action
PSII inhibitors - Serine 264 Binders (C1 C2/5)
Inhibition of Cellulose Synthesis (L/26)
 		5254
19 Avena sterilisSterile OatItaly 200424 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
 		5632
20 Sorghum halepenseJohnsongrassItaly 200524 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5354
21 Echinochloa crus-galli var. crus-galliBarnyardgrassItaly 200524 Inhibition of Acetolactate Synthase (B/2)
 		5356
22 Lolium perenne ssp. multiflorumItalian RyegrassItaly 200524 Inhibition of Acetolactate Synthase (B/2)
 		8907
23 Echinochloa erectaPollacci BarnyardgrassItaly 200524 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		8909
24 Digitaria sanguinalisLarge CrabgrassItaly 200624 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5355
25 Sinapis arvensisWild MustardItaly 200624 Inhibition of Acetolactate Synthase (B/2)
 		5677
26 Lolium rigidumRigid RyegrassItaly 200724 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5370
27 Sorghum halepenseJohnsongrassItaly 200724 Inhibition of Acetolactate Synthase (B/2)
 		8905
28 Avena sterilisSterile OatItaly 200724 Inhibition of Acetolactate Synthase (B/2)
 		8908
29 Lolium perenne ssp. multiflorumItalian RyegrassItaly 200824 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		8902
30 Echinochloa crus-galli var. crus-galliBarnyardgrassItaly 200924 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
 		5639
31 Alopecurus myosuroidesBlackgrassItaly 200924 Inhibition of Acetyl CoA Carboxylase (A/1)
 		5681
32 Oryza sativa var. sylvaticaRed RiceItaly 201024 Inhibition of Acetolactate Synthase (B/2)
 		5614
33 Amaranthus tuberculatus (=A. rudis)Tall WaterhempItaly 201024 Inhibition of Acetolactate Synthase (B/2)
 		32269
34 Conyza canadensisHorseweedItaly 201124 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		5617
35 Echinochloa crus-galli var. crus-galliBarnyardgrassItaly 201124 Inhibition of Acetyl CoA Carboxylase (A/1)
 		8904
36 Lolium perenne ssp. multiflorumItalian RyegrassItaly 201224 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		8903
37 Cyperus esculentusYellow NutsedgeItaly 201724 Inhibition of Acetolactate Synthase (B/2)
 		24256
38 Amaranthus hybridus (syn: quitensis)Smooth PigweedItaly 201824 Inhibition of Acetolactate Synthase (B/2)
 		27281
39 Amaranthus palmeriPalmer AmaranthItaly 201824 Inhibition of Acetolactate Synthase (B/2)
 		32268
40 Eleusine indicaGoosegrassItaly 201924 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		18208
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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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