Introduction

47
Table 8. Herbicide Site of Action and Chemical Family for Resistant Weed Management, continued
Site of Action (Group) Common Name Herbicide Tradename Premix or Co-pack Tradenames*
Lipid Synthesis
Inhibition (8)
Thiocarbamate
EPSP Synthase
Inhibitor (9)
Glutamine Synthetase
Inhibitor (10)
Bleaching: DOXP
Synthase Inhib. (13)
PPO (Protox)
Inhibitor (14)
Diphenyletherimine
EPTC
triallate
glyphosate-IPA,
K, DMA
Eptam
Avadex Brands
several - see page 231
glufosinate Good Harvest, Liberty 150, Liberty 200 -
clomazone Command -
acifluorfen
fomesafen
Ultra Blazer
Reflex
-
Fortress MicroActive*
CleanStart*, Eclipse III*,
FlexStar GT*, Glykamba*, PrePass XC*,
Roundup Xtend*
-
Flexstar GT*
Weed Control
N-phenylphthalimide flumioxazin Chateau=Valtera -
Phenylpyrazole pyraflufen BlackHawk (with pyraflufen)*,
Goldwing*
Pyrimidinedione saflufenacil Heat (WG and LQ) -
Triazolinone
carfentrazone
sulfentrazone
Aim
Authority
Authority Charge, Blackhawk (with
carfentrazone)*, CleanStart*, Conquer*,
Focus*
Authority Charge*
Very Long Chain
Fatty Acid Inhibitor
(15)
Acetamide
dimethenamid-P Frontier Max=Outlook -
Chloroacetamide S-metolachlor+
safener
pyroxasulfone
Dual II Magnum
-
Battalion*, Primextra II Magnum*
Focus*
Auxin Inhibitor (19) diflufenzopyr - Distinct*=Overdrive*
Photosystem I
Inhibitor (22)
diquat
Reglone=Craven=Desica=
Dessicash=MasterLine Diquat=Stage,
Reglone Ion, Reward
paraquat
Gramoxone
-
Unknown (26) quinclorac (grass) Clever=MasterLine Quinclorac -
Bleaching: HPPD
Inhibition(27)
Pyrazolone
pyrasulfotole
topramezone
-
Impact=Armezon
-
Axial iPak*, Infinity*, Infinity FX*,
Tundra*, Velocity m 3*
-
Adapted from WSSA Herbicide Classification System For Resistant Weed Management. Weed Technol. 17:606-608 and
the NDSU Weed Control Guide.
Contact herbicides = Groups 5, 6, 7, 10, 14, and 22.
* Products contain more than one active ingredient and appear in more than one group. In some instances, both
active ingredients act to kill the same weed using different modes of action. In these instances, use of tank mixes may
slow down the process of developing weed resistance.
New herbicides do not necessarily have a unique mode of action and may fall within the groups listed in the charts.
Herbicides that have the same mode of action may not control the same weed spectrum or have the same crop safety.
For example, Assert and Ally have the same mode of action; however, Assert controls wild oats while Ally does not.