Herbicides
43
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Safety - page 25 • First aid - page 33 • Resistance management - page 41
Herbicide Group Classification by Mode of Action
Mode of Action
Chemical family
Active ingredients
Found in*
Group 1
Inhibitors of
acetyl CoA
carboxylaseACCase,
These chemicals block
an enzyme called
ACCase. This enzyme
helps the formation of
lipids in the roots of
grass plants. Without
lipids, susceptible
weeds die.
Aryloxyphenoxy
proprionate (Fop)
clodinafop propargyl
Foothills SG, Harmony K, Harmony Max, Harmony SG,
Horizon SG, Ladder, MPower Aurora, NextStep SG,
NuFarm clodinafop,Signal, Signal D, Signal M, Traxos
fenoxaprop-p-ethyl
Bengal, Cordon, MPower Hellcat, Puma Super, Puma
Advance, Tundra, WildCat, Vigil
quizalofop-p-ethyl
Assure II, Yuma
Cyclohexanediones
(
Dim)
clethodim
Arrow 240 EC, Centurion, Select,
Shadow RTM
sethoxydim
Poast Ultra
tepraloxydim
Equinox, FlaxMax DLX, Odyssey DLX
tralkoxydim
Achieve Liquid Gold, Liquid Achieve, Titanium, Bison,
Marengo
Phenylpyrazolin (Den) pinoxaden
Axial, Axial iPak, Broadband, Traxos
Group 2
ALS/AHAS inhibitors.
These chemicals
block the normal
function of an enzyme
called acetolactate
(
ALS) actohydroxy
acid (AHAS). This
enzyme is essential in
amino acid (protein)
synthesis. Without
proteins, plants starve
to death.
Imidazolinones
AC 299,263 120 AS
Altitude FX
imazamethabenz
Assert 300, Assert FL, Avert
imazamox
Adrenalin SC, Ares, Solo, Tensile, Viper
imazamox + imazethapyr Absolute, Odyssey, Odyssey DLX
imazapyr
Arsenal, Ares
imazethapyr
Gladiator, Multistar, Pursuit, MPOWER Kamekaze
Sulfonylamino-
carbonyltriazolinones
flucarbazone sodium Everest, Inferno Duo, Pace, Prepare, Prepare Complete
Sulfonylureas
chlorsulfuron
Telar
ethametsulfuron methyl
Muster
metsulfuron-methyl
Ally Toss-N-Go, Escort, Accurate,
Express Pro, Reclaim
nicosulfuron
Accent
rimsulfuron
Prism
thifensulfuron-methyl
Barricade, Broadside, Deploy, Harmony K, Harmony Max,
Harmony SG, Nimble, Refine SG, Retain, Triton C
tribenuron-methyl
Barricade, Broadside, Deploy, Express Pack, Express
SG, Express Pro, FirstStep Complete, Harmony K,
Harmony Max, Harmony SG, Inferno Duo, KoAct,
Nimble, , Nuance, Refine SG, Refine M, Retain, Spike-
Up, Triton C, Triton K
triflusulfuron methyl
UpBeet
Triazolpyramidines florasulam
Assert FL, Benchmark, Broadband, Frontline, Frontline
XL, Frontline 2,4-D, PrePass, Spectrum, Stellar
pyroxsulam
Simplicity,Tandem
Triazolones
thiencarbazone-methyl
Velocity m3, Varro
(
continued)
*
A herbicide may appear in more than one group if it contains more than one active ingredient.