Herbicide label

Tomahawk 4

Tomahawk 4 (EPA 33270-18) is a Group 9 glyphosate herbicide labeled for 46 crops. The label lists 178 controlled weeds, plus partial-control, suppression, and partner-control categories.

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Official EPA label (PDF)

“This product is a postemergence, systemic, non-selective herbicide and will control many annual weeds, perennial weeds, woody brush and trees.”

— Tomahawk 4 EPA label, Reg. No. 33270-18

Tomahawk 4 label facts

Product Tomahawk 4
EPA Reg. No. 33270-18
Active ingredient glyphosate
MOA group 9

Crops on the Tomahawk 4 label

Tomahawk 4 is labeled for these 46 crops and uses, per the EPA label.

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Weeds on the Tomahawk 4 label

The Tomahawk 4 label names 198 weeds and rates each by how the product handles it: full control, partial control, suppression, or control with a tank-mix partner. A weed can fall at more than one level, because control varies by crop, rate, and timing.

Controls

full control178

alfalfa
ammannia, purple
anoda, spurred
bahiagrass
barley
barley, little
barnyardgrass, common
bassia, fivehook
beggarweed, florida
bermudagrass
bermudagrass, water
bindweed, field
bittercress
blackberry
blackgum
bluegrass, annual
bluegrass, bulbous
bluegrass, kentucky
blueweed, texas
brackenfern
brome, downy
brome, japanese
bromegrass, smooth
buckwheat, wild
burcucumber
bursage, woolly-leaf
buttercup
canarygrass, reed
carpetweed
cattail
chamise
cheat
chervil
chickweed
clover, red
clover, white
cocklebur, common
cogongrass
copperleaf, hophornbean
copperleaf, virginia
coreopsis, plains
corn, volunteer
crabgrass
virginia creeper
crowfootgrass
cupgrass, woolly
dallisgrass
dandelion
devilsclaw
dock, curly
dogbane, hemp
dwarfdandelion
eclipta
eucalyptus
eveningprimrose, cutleaf
falsedandelion
falseflax, smallseed
fescue
fescue, tall
fiddleneck
filaree, broadleaf
fleabane, annual
fleabane, hairy
fleabane, rough
foxtail, bristly
foxtail, carolina
foxtail, giant
foxtail, green
foxtail, yellow
carolina geranium
goatgrass, jointed
goosegrass
groundcherry
groundsel, common
guineagrass
hazel
poison hemlock
henbit
honeysuckle
horsenettle
horseradish
horseweed
itchgrass
poison ivy
jerusalem artichoke
jimsonweed
johnsongrass
johnsongrass, seedling
junglerice
kikuygrass
knapweed
knotweed
kochia
lambsquarters
lespedeza
prickly lettuce
mannagrass, eastern
mayweed
milkweed, common
millet, wild-proso
morning glory, annual
muhly, wirestem
mullein, common
mustard, blue
mustard, tansy
mustard, tumble
mustard, wild
nightshade, black
nightshade, hairy
nightshade, silverleaf
nutsedge, purple
nutsedge, yellow
oak, pin
oats
wild oats
orchardgrass
pampasgrass
panicum, browntop
panicum, fall
panicum, texas
paragrass
pennycress, field
pepperweed, virginia
pigweed
amaranth, palmer
pokeweed, common
purslane
pusley, florida
quackgrass
ragweed, common
ragweed, giant
reed, giant
red rice
rocket, london
rocket, yellow
cereal rye
rye, volunteer
ryegrass
ryegrass, perennial
sandbur, field
sandbur, longspine
sesbania, hemp
shattercane
shepherd's-purse
sicklepod
sida, prickly
signalgrass, broadleaf
smartweed, ladysthumb
smartweed, pennsylvania
smartweed, swamp
grain sorghum
sowthistle, annual
sowthistle, perennial
needles, spanish
speedwell, corn
speedwell, purslane
sprangletop
spurge, prostrate
spurge, spotted
spurry, umbrella
starthistle, yellow
stinkgrass
sunflower
sweetgum
swinecress
thistle, canada
thistle, russian
timothy
torpedograss
trumpetcreeper
vaseygrass
velvetgrass
velvetleaf
waterhemp, common
wheat
wheat, overwintered
wheatgrass, western
witchgrass

Partial control

partial15

alligatorweed
bearclover
buckwheat, california
catsclaw
hasardia
monkey flower
peppertree, brazilian
phragmites
sage, black
sage, white
sumac, sugarbush
sweet potato, wild
tanoak
thistle, artichoke
waxmyrtle, southern

Suppression

suppression4

bentgrass
dodder
redvine
spurge, leafy

Controls with a tank-mix partner

needs partner1

mallow

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Tomahawk 4 rates and plant-back

The label answers both with a table, not a single number. Here is what drives each answer.

Application rate

Your rate depends on your crop.

Get the rate for your field: build a program and FieldMarshal gives you the exact per-acre rate for your crop from the label line.

Plant-back and rotation

Your interval depends on your application rate, the rotational crop, and your state, region, and rainfall — some intervals differ in AZ, CA, CO, ID, KS, MN, MT, ND, NE, OK, OR, SD, and WA.

Get the interval for your rotation: build a program and FieldMarshal gives you the exact plant-back for your rotational crop from the label line.

Tomahawk 4 FAQ

What weeds does Tomahawk 4 control?

The Tomahawk 4 label names 198 weeds, including alfalfa, purple ammannia, spurred anoda, bahiagrass, barley, and little barley. Control varies by crop, rate, and timing.

What crops is Tomahawk 4 labeled for?

Tomahawk 4 is labeled for 46 crops and uses, including field corn, soybeans, wheat, cotton, and sunflower.

What is the active ingredient in Tomahawk 4? Is it a generic?

Tomahawk 4's active ingredient is glyphosate (MOA Group 9). Other products list the same active ingredient; rates, formulations, and labeled crops differ — verify each on its own label.

What's the plant-back interval after Tomahawk 4?

It depends on your rotational crop, application rate, and region, so the label gives a table, not one number. Build a program and FieldMarshal gives you the exact interval for your rotation from the label line, so you can verify it.

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Can I tank-mix Tomahawk 4?

It depends on your target weeds, crop stage, and which partners the label approves. Build a program and FieldMarshal checks the label for approved partners and gives the condition on each, so you can verify it.