International Survey of Herbicide-Resistant Weeds

Countries Weeds Herbicides Mutations Graphs References Researchers
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Herbicide Resistant Weeds in Japan
Herbicide Resistant Weeds in Japan
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Herbicide Resistant Weeds in Japan
#SpeciesCommon NameFirst YearSite of Action
1 Conyza canadensisHorseweedJapan 198025 PS I Electron Diversion (D/22)
 		119
2 Erigeron philadelphicusPhiladelphia FleabaneJapan 198025 PS I Electron Diversion (D/22)
 		125
3 Poa annuaAnnual BluegrassJapan 198225 PSII inhibitors - Serine 264 Binders (C1 C2/5)
 		117
4 Youngia japonicaAsiatic HawksbeardJapan 198625 PS I Electron Diversion (D/22)
 		124
5 Conyza sumatrensisSumatran FleabaneJapan 198625 PS I Electron Diversion (D/22)
 		126
6 Conyza bonariensisHairy FleabaneJapan 198925 PS I Electron Diversion (D/22)
 		128
7 Gamochaeta pensylvanicaPennsylvania EverlastingJapan 199125 PS I Electron Diversion (D/22)
 		7789
8 Monochoria korsakowiiMizuaoi (JPN)/Moolokzam (KOR)Japan 199425 Inhibition of Acetolactate Synthase (B/2)
 		129
9 Lindernia dubia (=Lindernia dubia var. major)Low False-pimpernelJapan 199525 Inhibition of Acetolactate Synthase (B/2)
 		539
10 Limnophila sessilifloraLimnophila (Asian marshweed)Japan 199625 Inhibition of Acetolactate Synthase (B/2)
 		536
11 Lindernia procumbensCommon False-pimpernel; Azena (Japanese)Japan 199625 Inhibition of Acetolactate Synthase (B/2)
 		537
12 Lindernia micranthaAzetogarashi (Japanese)Japan 199625 Inhibition of Acetolactate Synthase (B/2)
 		540
13 Schoenoplectus juncoidesRock BulrushJapan 199625 Inhibition of Acetolactate Synthase (B/2)
 		5131
14 Elatine triandra var. pedicellataMizohakobe (Waterwort)Japan 199725 Inhibition of Acetolactate Synthase (B/2)
 		5142
15 Rotala indica var. uliginosaKikashigusaJapan 199725 Inhibition of Acetolactate Synthase (B/2)
 		5144
16 Sagittaria trifoliaThreeleaf ArrowheadJapan 199725 Inhibition of Acetolactate Synthase (B/2)
 		7765
17 Monochoria vaginalisArrowleafed MonochoriaJapan 199825 Inhibition of Acetolactate Synthase (B/2)
 		7764
18 Schoenoplectus wallichiiTaiwan-yamaiJapan 200025 Inhibition of Acetolactate Synthase (B/2)
 		7790
19 Alopecurus aequalisShortawn FoxtailJapan 200425 Multiple Resistance: 2 Sites of Action
Inhibition of Acetolactate Synthase (B/2)
Inhibition of Microtubule Assembly (K1/3)
 		5570
20 Ammannia coccineaRedstemJapan 200425 Inhibition of Acetolactate Synthase (B/2)
 		7791
21 Alopecurus aequalisShortawn FoxtailJapan 200525 Inhibition of Microtubule Assembly (K1/3)
 		11018
22 Mazus pumilusJapanese MazusJapan 200625 PS I Electron Diversion (D/22)
 		7767
23 Sagittaria pygmaeaDwarf ArrowheadJapan 200625 Inhibition of Acetolactate Synthase (B/2)
 		7792
24 Alopecurus aequalisShortawn FoxtailJapan 200625 Inhibition of Acetolactate Synthase (B/2)
 		11019
25 Alisma canaliculatumHera-omodakaJapan 200725 Inhibition of Acetolactate Synthase (B/2)
 		7793
26 Rotala pusillaMizu-matsubaJapan 200725 Inhibition of Acetolactate Synthase (B/2)
 		7794
27 Dopatrium junceumDopatriumJapan 200725 Inhibition of Acetolactate Synthase (B/2)
 		7795
28 Bacopa rotundifoliaDisc WaterhyssopJapan 200725 Inhibition of Acetolactate Synthase (B/2)
 		7800
29 Eleocharis acicularisNeedle SpikerushJapan 200825 Inhibition of Acetolactate Synthase (B/2)
 		7766
30 Echinochloa crus-galli var. formosensisTaiwan barnyardgrassJapan 200925 Inhibition of Acetyl CoA Carboxylase (A/1)
 		7799
31 Beckmannia syzigachneAmerican SloughgrassJapan 201025 Inhibition of Microtubule Assembly (K1/3)
 		7768
32 Echinochloa crus-galli var. crus-galliBarnyardgrassJapan 201025 Inhibition of Acetyl CoA Carboxylase (A/1)
 		7769
33 Cyperus brevifoliusShortleaf SpikesedgeJapan 201025 Inhibition of Acetolactate Synthase (B/2)
 		7798
34 Echinochloa crus-galli var. formosensisTaiwan barnyardgrassJapan 201025 Multiple Resistance: 2 Sites of Action
Inhibition of Acetyl CoA Carboxylase (A/1)
Inhibition of Acetolactate Synthase (B/2)
 		10997
35 Lolium perenne ssp. multiflorumItalian RyegrassJapan 201125 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		7770
36 Eleusine indicaGoosegrassJapan 201325 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		10998
37 Conyza canadensisHorseweedJapan 201425 Inhibition of Enolpyruvyl Shikimate Phosphate Synthase (G/9)
 		10999
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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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