Table 2.1-9

Table 2.1-9. mportant herbicide groups for corn, soybean, small grain, forages, and some vegetable crops.
WSSA herbicide group¹ Herbicide class Site of action Chemical family Active ingredient Trade name
1 Fatty acid (Lipid) biosynthase inhibitors ACCase aryloxyphenoxy propionates dicofop Hoelon
fenoxaprop Fusion (part)
fluazifop Fusilade
quizalofop Assure/Targa
cyclohexanediones clethodim Select
sethoxydin Poast/Poast Plus
tralkoxydin Achieve
2 Amino acid biosynthesis ALS-enzyme imidazolinone imazamethaben Assert
imazamox  
imazapyr Raptor, Beyond
imazaquin Arsenal
imazethapyr Scepter
  Pursuit
sulfonylamino-carbonyl-triazolinones flucarbazone Everest
propoxycarbazone Olympus
sulfonylurea chlorimuron Classic
chlorsulfuron Glean, Telar
foramsulfuron Option
halosulfuron Permit/Sandea
iodosulfuron Autumn
mesosulfuron Osprey
metsulfuron Ally, Cimarron
nicosulfuron Accent
primisulfuron Beacon
prosulfuron Peak
rimsulfuron Matrix, Resolve
thifensulfuron Harmony SG
sulfosulfuron Maverick
triasulfuron Amber
tribenuron Express
triazolopyrimidine (sulfonamides) cloransulam FirstRate
flumetsulam Python
9   EPSP-enzyme amino acid derivative glyphosate Roundup, Touchdown
3 Seedling growth inhibitors (root) Microtubule inhibitors dinitroanilines benefin Balan
ethalfuralin Curbit, Sonalan
pendimethalin Prowl, Pendulum
trifluralin Treflan, various
prodiamine Baricade
pyridazines dithiopyr Dimension
unknown none DCPA Dacthal
4 Plant growth regulators IAA-like phenoxy 2,4-D various
2,4-DB Butyrac
MCPA various
benzoic acid dicamba Banvel, Clarity
carboxylic acid (pyridines) aminopyralid Milestone
clopyralid Stinger
fluroxypyr Starane
ouckiran Tordon
triclopyr Garlon, Remedy
19 Auxin transport inhibitor IAA transport semicarbazone diflufenzopyr Status (component)
phthalamate naptalam Alanap
5 Photosynthesis inhibitors (mobie 1) Photosystem II triazines ametryn Evik
atrazine Atrazine
prometon Pramitol
propazine Milo Pro
simazine Princep
triazinones hexazinone Velpar
metribuzin Sencor
uracils terbacil Sinbar
6 Photosynthesis inhibitors (nonmobile) Photosystem II benzothiadiazole bentazon Basagran
nitriles bromoxynil Buctril
phenyl-pyridazine pyridate Tough
7 Photosynthesis inhibitors (mobile 2) Photosystem II ureas diuron Karmex
linuron Lorox
tebuthiuron Spike
22   Photosystem I (electron diversion) bipyridyliums paraquat Gramoxone
phenylpyrazoline pinoxaden Axial
none bensulide Prefar
10 Phosphorylated amino acid (N metabolism disrupter) Glutamine synthetase amino acid derivative glufosinate Liberty, Finale
13 Pigment inhibitors Diterpenes (carotenoid biosynthesis) isoxazolidinone clomazone Command
27   HPPD (hydroxy-phenyl-pyruvate-dioxygenase triketone mesotrione Callisto
tembotrione Laudis
topramezone Impact
14 Cell membrane disrupters PPO (protoporphyr-ingogen oxidase) diphenyl ethers acifluorfen Blazer
fomesafen Reflex, Flexstar
lactofen Cobra
oxyfluorfen Goal
N-phenyl-phthalimides flumiclorac Resource
flumioxazin Valor, Payload
fluthiacet Action
oxadiazole oxadiazon Ronstar
triazolinone carfentrazone Aim
  sulfentrazone Authority
8 Seedling growth inhibitors (shoot) Lipid synthesis inhibitors thiocarbamates butylate Sutan
EPTC Eptam/Eradicane
vernolate Vernam
15 Seedling growth inhibitors (shoot) Unknown chloroacetamides acetochlor Harness/Topnotch
alachlor Breakfree/Degree
dimethenamid Micro-Tech
metolachlor Outlook
pronamide Dual, Cinch
propachlor Kerb
  Ramrod
acetamides napropamide Devrinol
oxyacetamides flufenacet Define
21 Cell wall biosynthesis inhibitor Cell wall synthesis—site B benzamide isoxaben Gallery
26   unknown quinoline carboxylic acid quinclorac Paramount