INTERNATIONAL HERBICIDE-RESISTANT WEED DATABASE
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PSII inhibitors - Serine 264 Binders - GROUP 5 (Legacy HRAC Group C1 C2)
 ActiveCompanyExample Trade Name   

Amides
 Amideschloranocryl/dicryl1390  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Amidespentanochlor1405  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Amidespropanil105Rohm & HaasStam, Stam F-34, FW-734C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Amidessolan257 PentanochlorC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure

Phenyl-carbamates
 Phenyl-carbamateschlorprocarb1401  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Phenyl-carbamatesdesmedipham80Bayer Crop Science (ex Aventis)Betanal AM, Betanex, SN 38107C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Phenyl-carbamatesphenisopham1406  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Phenyl-carbamatesphenmedipham79 Betanal, SN 38584C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure

Pyridazinones
 Pyridazinonesbrompyrazon1387  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Pyridazinoneschloridazon/pyrazon81BASFPyramin, chloridazon, BAS 119HC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure

Triazines
 Triazinesametryne87Syngenta (ex Nov.)Gesapax, Evik, G-34162C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesatraton1370  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesatrazine90Syngenta (ex Nov.)Attrex, Gesaprim, G-30027C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesaziprotryne/aziprotryn1371  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazineschlorazine1372  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 TriazinesCP 170291373  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinescyanazine98BASF (ex Am.Cy.)Bladex, WL 19805C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinescyanazine98GriffinBladex, WL 19805C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinescyprazine1374  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesdesmetryne92Syngenta (ex Nov.)SemeronC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesdimethametryn83Syngenta (ex Nov.)Avirosan, C-18898C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesdipropetryn1392  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazineseglinazine-ethyl85Nitrokema IpartelepekMG-60C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesmethoprotryne=methoprotryn1376  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesprocyazine1375  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesproglinazine-ethyl86Nitrokema IpartelepekMG-07C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesprometon96Syngenta (ex Nov.)Pramitol, Gesagram, G-31435C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesprometryne95Syngenta (ex Nov.)Caparol, Gesagard, G-34161C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinespropazine97Syngenta (ex Nov.)Milogard, Milo Pro, Gesamil, G-30027C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinessebuthylazine1369  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinessecbumeton1377  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinessecbumeton1407  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinessimazine91Syngenta (ex Nov.)Gesatop, Princep, G-27692C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinessimetryne88Syngenta (ex Nov.)Gybon, G-32911C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesterbumeton89Syngenta (ex Nov.)CaragardC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesterbuthylazine93Syngenta (ex Nov.)Gardoprim, GS-13529C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinesterbutryne94Syngenta (ex Nov.)Igran, PrebaneC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinestrietazine84Bayer Crop Science (ex Aventis)Remtal, NC 1667C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure

Triazinones
 Triazinonesethiozin1393  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinoneshexazinone101DuPontVelpar, DPX-3674C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinonesisomethiozin1396  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinonesmetamitron100Bayer CropScienceGoltix, BAY DRW 1139C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinonesmetribuzin99Bayer CropScienceSencor, Sencorex, BAY 94337, Lexone, DPX-2504C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Triazinonesmetribuzin99DuPontSencor, Sencorex, BAY 94337, Lexone, DPX-2504C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure

Uracils
 Uracilsbromacil104DuPontHyvar X, DuPont 976C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Uracilsisocil1395  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Uracilslenacil102DuPontVenzar, DuPont 634C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Uracilsterbacil103DuPontSinbar, DuPont 732C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure

Ureas
 Ureasbenzthiazuron1386  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasbromuron1388  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasbuturon1389  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureaschlorbromuron120Syngenta (ex Nov.)Maloran, C-6313C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureaschlorotoluron119Syngenta (ex Nov.)Dicuran, C-2242C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureaschloroxuron118Syngenta (ex Nov.)Tenoran, C-1983C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasdifenoxuron1391  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasdimefuron111Bayer Crop Science (ex Aventis)Pradone, Ranger, Scorpio, RP-23465C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasdiuron116DuPontKarmexC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasethidimuron115Bayer CropScienceUstilan, BAY MET 1486C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasfenuron121DuPontPDUC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasfenuron121HopkinsPDUC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasfluometuron (also group C2)114Syngenta (ex Nov.)Cotoran, Lanex, C-2059C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasfluothiuron1394  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasisoproturon117Bayer Crop Science (ex Aventis)Alon, Arelon, HOE 16410, Tolkan, Graminon, CGA-18731C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasisoproturon117Syngenta (ex Nov.)Alon, Arelon, HOE 16410, Tolkan, Graminon, CGA-18731C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasisoproturon117Bayer Crop Science (ex Aventis)Alon, Arelon, HOE 16410, Tolkan, Graminon, CGA-18731C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasisouron5ShionogiIsoxylC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureaslinuron112Bayer Crop Science (ex Aventis)Afalon, HOE 2810, Lorox, DuPont 326C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureaslinuron112DuPontAfalon, HOE 2810, Lorox, DuPont 326C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasmethabenzthiazuron110Bayer CropScienceTribunil, BAY 74283C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasmetobenzuron1402  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasmetobromuron106Syngenta (ex Nov.)Patoran, C-3126C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasmetoxuron107Syngenta (ex Nov.)Dosanex, SAN-6602C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasmonolinuron109Bayer Crop Science (ex Aventis)Aresin, HOE 2747C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasmonuron1403  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasneburon108DuPontKlobenC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasparafluron1404  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureassiduron113DuPontTupersanC1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureastebuthiuron123Dow AgroSciencesSpike, Perflan, EL-103C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
 Ureasthiazafluron1408  C1 C2PSII inhibitors - Serine 264 Binders Inhbition of Photosynthesis at PSll - Serine 264 Binders Small Structure Medium Structure Large Structure
HRAC Global Heap, I.  The International Herbicide-Resistant Weed Database.  Online.  Tuesday, September 29, 2026.  Available at  www.weedscience.org

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