Herbicide Mode of Action Groupings - 2016

Group Mode of Chemical Active Group Mode of Chemical Active Code Action Family Ingredient Code Action Family Ingredient A Inhibition of Acetyl CoA Aryloxyphenoxy- clodinafop-propargyl F 1 Bleaching: Inhibition of Pyridazinones norflurazon* carboxylase (ACCase) propionates “FOPs” carotenoid biosynthesis at fenoxaprop-P-ethyl Pyridinecarboxamides diflufenican the phytoene desaturase fluazifop-P-butyl step (PDS) Others fluridone* haloxyfop-P F 2 Bleaching: Inhibition of Triketones mesotrione quizalofop-P-ethyl 4 –hydroxyphenylpyruvate -dioxygenase (4 –HPPD) topramezone Cyclohexanediones “DIMs” clethodim F 3 Bleaching: Inhibition of Triazoles amitrole sethoxydim carotenoid biosynthesis Isoxazolidinones clomazone tepraloxydim (unknown target) tralkoxydim* G Inhibition of EPSP synthase Glycines glyphosate Phenylpyrazoline “DEN” pinoxaden H Inhibition of glutamine Phosphinic acids glufosinate-ammonium synthetase B Inhibition of acetolactate Sulfonylureas chlorimuron-ethyl synthase ALS I Inhibition of DHP Carbamates asulam chlorsulfuron (acetohydroxyacid (dihydropteroate) synthase flazasulfuron synthase AHAS) K 1 Microtubule assembly Dinitroanilines oryzalin foramsulfuron* inhibition pendimethalin halosulfuron-methyl trifluralin iodosulfuron Benzamides propyzamide mesosulfuron-methyl Benzenedicarboxylic acids chlorthal-dimethyl metsulfuron-methyl K 2 Inhibition of mitosis/ Carbamates chlorpropham nicosulfuron microtubule organisation propham* primisulfuron-methyl carbetamide* thifensulfuron-methyl K 3 Inhibition of cell division Chloroacetamides acetachlor tribenuron-methyl alachlor Imidazolinones imazapyr dimethanamid-P imazethapyr S-metolachlor Triazolopyrimidines flumetsulam propachlor C 1 Inhibition of photosynthesis Triazines ametryn* Oxyacetamides flufenacet at photosystem II atrazine L Inhibition of cell wall Nitriles dichlobenil cyanazine (cellulose) synthesis desmetryn* N Inhibition of lipid synthesis – Thiocarbamates EPTC* not ACCase inhibition prometryn triallate propazine Benzofuranes ethofumesate simazine Chloro-Carbonic-acids TCA terbumeton* 2,2-dichloropropionic acid terbuthylazine flupropanate terbutryn O 1 Action like Indole acetic Phenoxy-Carbonic-acids 2,4-D acid (synthetic auxins) Triazones hexazinone 2,4-DB metamitron dichlorprop-P metribuzin MCPA Uracils bromacil MCPB terbacil mecoprop Pyridazinones chloridazon mecoprop-P Phenyl-carbamates desmedipham O 2 Benzoic acids dicamba phenmedipham O 3 Pyridine carboxylic acids aminopyralid C 2 Inhibition of photosynthesis Ureas diuron clopyralid at photosystem II isoproturon fluroxypyr linuron picloram methabenzthiazuron triclopyr C 3 Inhibition of photosynthesis Nitriles bromofenoxim* Z Unknown Arylaminopropionic acids flamprop-M-isopropyl at photosystem II bromoxynil Organoarsenicals MSMA* ioxynil Other benzalkonium chloride Benzothiadiazinone bentazone chloropicrin Phenyl-pyridazines pyridate* dazomet D Photosystem I electron Bipyridyliums diquat endothal diversion paraquat fatty acids E Inhibition of Diphenylethers oxyfluorfen metam sodium protoporphyrinogen Oxadiazoles oxadiazon methyl bromide oxidase (PPO) Pyrimidindiones saflufenacil palm oil derived fatty acids Triazolinones carfentrazone ethyl pine oil sulfentrazone gibbrellic acid * Not registered or no longer available in New Zealand. Information sourced from Novachem Agrichemical Manual 2016/17.

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