International Survey of Herbicide-Resistant Weeds

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Herbicide Resistant Weeds in Switzerland
Herbicide Resistant Weeds in Switzerland
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Herbicide Resistant Weeds in Switzerland
#SpeciesCommon NameFirst YearSite of Action
1 Chenopodium albumCommon LambsquartersSwitzerland 197741 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		200
2 Amaranthus blitum (ssp. oleraceus)Livid AmaranthSwitzerland 197841 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		196
3 Amaranthus hybridus (syn: quitensis)Smooth PigweedSwitzerland 198241 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		198
4 Amaranthus retroflexusRedroot PigweedSwitzerland 198241 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		199
5 Chenopodium polyspermumManyseeded GoosefootSwitzerland 198241 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		202
6 Conyza canadensisHorseweedSwitzerland 198241 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		203
7 Senecio vulgarisCommon GroundselSwitzerland 198241 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		205
8 Solanum nigrumBlack NightshadeSwitzerland 198341 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		207
9 Amaranthus powelliiPowell AmaranthSwitzerland 198641 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		197
10 Chenopodium ficifoliumFigleaved GoosefootSwitzerland 198641 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		201
11 Senecio vulgarisCommon GroundselSwitzerland 198741 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		206
12 Galinsoga ciliataHairy GalinsogaSwitzerland 199141 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		204
13 Apera spica-ventiSilky WindgrassSwitzerland 199441 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		208
14 Alopecurus myosuroidesBlackgrassSwitzerland 199741 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		1132
15 Lolium perenne ssp. multiflorumItalian RyegrassSwitzerland 201141 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		11007
16 Lolium perenne ssp. multiflorumItalian RyegrassSwitzerland 201841 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
 		20226
17 Lolium perenne ssp. multiflorumItalian RyegrassSwitzerland 201841 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		20227
18 Alopecurus myosuroidesBlackgrassSwitzerland 201941 Multiple Resistance: 3 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		20228
19 Conyza bonariensisHairy FleabaneSwitzerland 202041 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		24247
20 Lolium perenne ssp. multiflorumItalian RyegrassSwitzerland 202041 Multiple Resistance: 3 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		24249
21 Conyza canadensisHorseweedSwitzerland 202141 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		24248
22 Digitaria sanguinalisLarge CrabgrassSwitzerland 202141 Inhibition of Acetolactate Synthase (B/2)
 		27290
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Cite this site as: Heap, I.  The International Survey of Herbicide Resistant Weeds.  Online.  Internet.  Tuesday, November 4, 2025 .  Available  www.weedscience.org
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