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This chart groups herbicides by their modes of action to assist you in
selecting herbicides 1) to maintain greater diversity in herbicide use and
2) to rotate among herbicides with different sites of action to delay the
development of herbicide resistance.
The Site of Action Group is a classification system developed by the Weed Science Society of America.
Lipid
Synthesis
Inhibitors
Site of
Action
Group
!
"
Number of resistant
weed species in U.S.
Site of Action
ACCase Inhibitors
(acetyl CoA carboxylase)
ALS Inhibitors
(acetolactate synthase)
Active
Ingredient
Product Examples
Aryloxyphenoxy
propionate
fenoxaprop
fluazifop
quizalofop
component of Fusion
Fusilade DX
Assure II, Targa
Cyclohexanedione
clethodim
sethoxydim
Select, Arrow
Poast, Poast Plus
Sulfonylurea
chlorimuron
foramsulfuron
halosulfuron
iodosulfuron
nicosulfuron
Classic
Option
Permit
Autumn
Accent Q
Chemical Family
15
44
(Trade Name ®)
This chart lists premix herbicides alphabetically by their trade names
so you can identify the premix’s component herbicides and their
respective site of action groups. Refer to the Mode of Action chart on
the left for more information.
Premix
Trade Name ®
Anthem
Trade Name ®
Zidua
Cadet
Autority Assist
Spartan
Pursuit
Authority First
Spartan
FirstRate
Autority MTZ
Spartan
Sencor
Authority XL
Spartan
Classic
Autumn Super
Autumn
------Basis Blend
Resolve
Harmony
Bicep II Magnum Dual II Magnum
(Bicep Lite II Mag) AAtrex
Boundary
Dual Magnum
Sencor
Breakfree ATZ
Breakfree
(Breakfree ATZ Lite) AAtrex
Bullet
Micro-Tech
AAtrex
Callisto Xtra
Callisto
AAtrex
Canopy
Classic
Sencor
Canopy EX
Classic
Express
Capreno
------Laudis
Cinch ATZ
Dual II Magnum
(Cinch ATZ Lite)
AAtrex
Corvus
------Balance Flexx
Degree Xtra
Degree
AAtrex
Enlite
Classic
Harmony
Valor
Component
Active Ingredient
pyroxasulfone
fluthiacet-ethyl
sulfentrazone
imazethapyr
sulfentrazone
cloransulam
sulfentrazone
metribuzin
sulfentrazone
chlorimuron
iodosulfuron
thiencarbazone
rimsulfuron
thifensulfuron
s-metolachlor
atrazine
s-metolachlor
metribuzin
acetochlor
atrazine
alachlor
atrazine
mesotrione
atrazine
chlorimuron
metribuzin
chlorimuron
tribenuron
thiencarbazone
tembotrione
s-metolachlor
atrazine
thiencarbazone
isoxaflutole
acetochlor
atrazine
chlorimuron
thifensulfuron
flumioxazin
Site of Action
Group
15
14
14
2
14
2
14
5
14
2
2
2
2
2
15
5
15
5
15
5
15
5
27
5
2
5
2
2
2
27
15
5
2
27
15
5
2
2
14
primisulfuron
prosulfuron
rimsulfuron
thifensulfuron
tribenuron
Beacon
Peak
Resolve
Harmony
Express
Envive
imazamox
imazaquin
imazethapyr
Raptor
Scepter
Pursuit
Exteme
flumetsulam
cloransulam
thiencarbazone
Python
FirstRate
component of Capreno
Fierce XLT*
EPSP Synthase
13
None accepted
Inhibitor
(5-enolpyruvyl-shikimate-3-phosphate)
glyphosate
Roundup, Touchdown,
others
Specific site
unknown
Phenoxy
2,4-D
Weedone, others
Benzoic acid
dicamba
Banvel, Clarity, others
Guardsman Max
(G-Max Lite)
Halex GT
Carboxylic acid
clopyralid
fluroxypyr
Stinger
Starane
Harness Xtra
Hornet
Amino
Acid
Synthesis
Inhibitors
Imidazolinone
Triazoloyrimidine
Triazolinones
9
:
Growth
Regulators
10
(Synthetic auxins)
%
Photosynthesis
Inhibitors
Auxin Transport
0
Semicarbazone
diflufenzopyr
component of Status
;
Photosystem II
Inhibitors
24
Triazine
Triazinone
atrazine
simazine
metribuzin
AAtrex, others
Princep
Sencor, others
Nitrile
bromoxynil
Buctril, Moxy
Benzothiadiazole
bentazon
Basagran
Photosystem II
7
Ureas
Inhibitors (different binding than 5 & 6)
linuron
Lorox, Linex
Glutamine Synthesis
Inhibitor
1
glufosinate
Liberty
Diterpene Synthesis
Inhibitor
1
HPPD Inhibitors
1
<
Metabolism
%
Pigment
Inhibitors
1
(different binding than 5 & 7)
=
Nitrogen
Photosystem II
Inhibitors
!>
!?
"=
None accepted
Fierce
Flexstar GT
Fusion
Gangster
!9
(different binding than 6 & 7)
Expert
Instigate
Keystone
(Keystone LA)
Lexar EZ
Lumax EZ
Marksman
NorthStar
Optill
Isoxazolidinone
clomazone
Command
Permit Plus
Priority
Isoxazole
isoxaflutole
Balance Flexx
Prefix
Classic
Harmony
Valor
Dual II Magnum
AAtrex
glyphosate
Pursuit
glyphosate
Valor
Zidua
Valor
Zidua
Classic
Flexstar
glyphosate
Fusilade DX
Puma
Valor
FirstRate
Outlook
AAtrex
Dual Magnum
Callisto
glyphosate
Harness
AAtrex
Stinger
Python
Resolve
Callisto
Surpass
AAtrex
Callisto
Dual II Magnum
AAtrex
Callisto
Dual II Magnum
AAtrex
Clarity
AAtrex
Beacon
Clarity
Sharpen
Pursuit
Harmony
Permit
Aim
Permit
Dual Magnum
Reflex
chlorimuron
thifensulfuron
flumioxazin
s-metolachlor
atrazine
glyphosate
imazethapyr
glyphosate
flumioxazin
pyroxasulfone
flumioxazin
pyroxasulfone
chlorimuron
fomesafen
glyphosate
fluazifop
fenoxaprop
flumioxazin
cloransulam
dimethenamid-P
atrazine
s-metolachlor
mesotrione
glyphosate
acetochlor
atrazine
clopyralid
flumetsulam
rimsulfuron
mesotrione
acetochlor
atrazine
mesotrione
s-metolachlor
atrazine
mesotrione
s-metolachlor
atrazine
dicamba
atrazine
primisulfuron
dicamba
saflufenacil
imazethapyr
thifensulfuron
halosulfuron
carfentrazone
halosulfuron
s-metolachlor
fomesafen
2
2
14
15
5
9
2
9
14
15
14
15
2
14
9
1
1
14
2
15
5
15
27
9
15
5
4
2
2
27
15
5
27
15
5
27
15
5
4
5
2
4
14
2
2
2
14
2
15
14
PAGE 2 OF 3
Pyrazolone
Triketone
topramezone
mesotrione
tembotrione
Impact, Armezon
Callisto
Laudis
Prequel
Pursuit Plus
Realm Q
!:
PPO Inhibitors
2
Cell
Membrane
Disrupters
""
Seedling
Root
Growth
Inhibitors
Seedling
Shoot
Growth
Inhibitors
Photosystem I
Electron Diverter
5
acifluorfen
fomesafen
lactofen
Ultra Blazer
Flexstar, Reflex, others
Cobra, Phoenix
Resolve Q
N-phenylphthalimide
flumiclorac
flumioxazin
Resource
Valor
Rezult
Aryl triazinone
Pyrimidinedione
sulfentrazone
carfentrazone
fluthiacet-ethyl
saflufenacil
Spartan
Aim
Cadet
Sharpen
Bipyridilium
paraquat
Gramoxone Inteon
Diphenylether
Require Q
Sequence
Shotgun
Sonic
Spartan Charge
Spirit
?
@
!;
Microtubule
Inhibitors
6
Lipid Synthesis
Inhibitors
(not ACCase)
5
Long-chain Fatty
Acid Inhibitor
1
* indicates product is not registered for use at
the time of printing. Check for a label and MSDS
at www.cdms.net to confirm status.
Dinitroaniline
Thiocarbamate
ethalfluralin
pendimethalin
trifluralin
Sonalan
Prowl H20, others
Treflan, others
butylate
EPTC
Sutan +
Eradicane
Status
Steadfast Q
SureStart
Synchrony
alachlor
metolachlor
dimethenamid
Degree, Harness, Surpass,
Warrant, others
Intrro, Micro-Tech
Dual II Magnum, others
Outlook
Oxyacetamide
flufenacet
Define
Pyrazole
pyroxasulfone
Zidua
Chloroacetamide
acetochlor
Glyphosate, Weeds, and Crop Series
Distributed by weed scientists from 16 North Central Universities, who are working on weed management in
glyphosate-resistant cropping systems. For information about obtaining copies of this publication and other
resources, see www.glyphosateweedscrops.org
Financial support for printing provided by BASF, Bayer CropScience, Dow AgroSciences, DuPont, Monsanto,
Syngenta, and Valent USA.
January 2013
GWC-3
!"#$%&'#()*+,*-#'.+"'#"/01(%"'#+"2*
3+44%5%*+,*65&#.74(7&84*8"9*:#,%*;.#%".%'<*
6"*%=784*+>>+&(7"#()*8.(#+"*%?>4+)%&2*
!"#$%&'#()*+,*-#'.+"'#"/01(%"'#+"*
>&+$#9%'*%=784*+>>+&(7"#(#%'*#"*
%?>4+)?%"(*8"9*>&+5&8??#"52*#".479#"5*
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TripleFLEX
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Verdict
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Balance Flexx
Pursuit
Prowl
Resolve
Callisto
Resolve
Harmony
Resolve
Clarity
Basagran
Poast
Dual Magnum
glyphosate
AAtrex
------Spartan
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Spartan
Aim
Peak
Beacon
------Clarity
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Python
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Valor
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pendimethalin
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mesotrione
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thifensulfuron
rimsulfuron
dicamba
bentazon
sethoxydim
s-metolachlor
glyphosate
atrazine
2,4-D
sulfentrazone
cloransulam
sulfentrazone
carfentrazone
prosulfuron
primisulfuron
diflufenzopyr
dicamba
nicosulfuron
rimsulfuron
acetochlor
clopyralid
flumetsulam
chlorimuron
thifensulfuron
acetochlor
clopyralid
flumetsulam
flumioxazin
chlorimuron
saflufenacil
dimethenamid-P
clopyralid
fluroxypyr
dicamba
halosulfuron
mesotrione
s-metolachlor
Layout provided by the University of Wisconsin’s Nutrient
and Pest Management program (ipcm.wisc.edu).
2
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14
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PAGE 3 OF 3
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