Herbicide label
Tomahawk 4 Herbicide Label
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.
“This product is a postemergence, systemic, non-selective herbicide and will control many annual weeds, perennial weeds, woody brush and trees.”
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.
- field corn
- soybean
- wheat
- cotton
- sunflower
- potato
- peanut
- sugar beet
- canola
- barley
- sorghum
- rice
- alfalfa
- annual ryegrass
- buckwheat
- cereal rye
- chickpea
- clover
- corn silage
- cowpea
- dry edible bean
- durum wheat
- fallow
- field pea
- flax
- grass seed
- hairy vetch
- lentil
- mint
- mustard
- oats
- pearl millet
- popcorn
- proso millet
- radish
- rapeseed
- safflower
- seed corn
- sesame
- spinach
- sugarcane
- sweet corn
- sweet potato
- triticale
- turnip
- wild rice
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
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 and the rotational crop.
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.
Sources
Last updated 2026-09-30.