Herbicides
45
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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 5
Photosynthetic
inhibitors at
Photosystem II,
Site A. These
chemicals interfere
with photosynthesis
and disrupt plant
growth, ultimately
leading to death.
Phenyl carbamates desmedipham
Betamix, Betamix ß
phenmedipham
Betamix, Betamix ß
Triazines
atrazine
Atrazine, Laddok, Primextra II Magnum
simazine
Princep Nine-T, Simazine 480
Triazinones
hexazinone
Velpar DF, Velpar L
metribuzin
Sencor
pyrazon
Pyramin
Uracils
bromacil
Calmix Pellets, Hyvar X/X-L, Krovar I
Group 6
Photosynthetic
inhibitors at
Photosystem II,
Site II.
Benzthiadiazoles
bentazon
Basagran, Basagran Forte, Laddok, Viper
Nitriles
bromoxynil
Achieve Liquid Gold, Approve, Axial iPak, Badge,
Bromotril, Brotex 240, Buctril M, Enforcer D,
Enforcer M, Infinity, Koril, Leader, Logic M, Mextrol,
Pardner, Signal D, Signal M, Thrasher, Thumper,
Titanium, Tundra, Velocity m3
Group 7
Photosynthetic
inhibitors at
Photosystem II, Site B.
Ureas
diuron
linuron
Diurex 80W, Karmex XP, Krovar I
Linuron, Lorox
Group 8
Lipid synthesis
inhibitors (not ACCase
inhibition). These
chemicals inhibit
the cell division and
elongation in the
seedling shoots
before they emerge
above ground.
Thiocarbamates
EPTC
triallate
Eptam
Avadex (Extra Strength) BW/MicroActiv, Fortess
Pyrazolium
difenzoquat
Avenge 200-C
Group 9
Inhibitors of EPSP
synthesis. These
chemicals inhibit the
amino-acid synthesis.
None
glyphosate
Cheminova Glyphosate, Clearout 41, Cleanstart,
Credit, Credit 45, Eclipse III, Factor 540, FirstStep
Complete, Glyphogan Plus, Glyfos, Knockout Extra,
Matrix, Maverick III, MPower glyphosate, NuGlo,
Pace, Prepare, Prepare Complete, PrePass, Renegade,
Roundup Transorb HC, Roundup Ultra2 Roundup
WeatherMax, Rustler, R/T 540, Sharpshooter,
Sharpshooter Plus, Spike-Up, StartUp, Takkle,
Touchdown Total, Traxion, Vantage Plus Max II,
Vector, Wise Up
(
continued)
*
A herbicide may appear in more than one group if it contains more than one active ingredient.