Herbicide label
Quinark EW Herbicide Label
Quinark EW (EPA 91234-255) is a Group 14 carfentrazone-ethyl herbicide labeled for 40 crops. The label lists 99 controlled weeds, plus partial-control, suppression, and partner-control categories.
“Carfentrazone-ethyl is a contact herbicide.”
Quinark EW label facts
- Product Quinark EW
- EPA Reg. No. 91234-255
- Registrant Atticus, LLC
- Active ingredient carfentrazone-ethyl
- MOA group 14
Crops on the Quinark EW label
Quinark EW is labeled for these 40 crops and uses, per the EPA label.
- field corn
- soybean
- wheat
- cotton
- sunflower
- potato
- peanut
- sugar beet
- barley
- sorghum
- alfalfa
- buckwheat
- cereal rye
- chickpea
- clover
- corn silage
- cowpea
- dry edible bean
- durum wheat
- fallow
- field pea
- flax
- grass seed
- lentil
- mint
- mustard
- oats
- popcorn
- radish
- rapeseed
- safflower
- seed corn
- sesame
- spinach
- sugarcane
- sweet corn
- sweet potato
- triticale
- turnip
- winter wheat
Weeds on the Quinark EW label
The Quinark EW label names 99 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 control99- amaranth, palmer
- amaranth, spiny
- pigweed
- anoda, spurred
- bedstraw, catchweed
- bindweed, field
- buckwheat, wild
- buffalobur
- burclover
- buttercup, smallflower
- carpetweed
- mallow
- chickweed
- cocklebur, common
- copperleaf, hophornbeam
- spurry, corn
- cotton, GMO varieties
- cotton, volunteer
- curled dock
- croton, woolly
- dandelion, common
- dayflower
- devilsclaw
- eclipta
- eveningprimrose, cutleaf
- fiddleneck
- filaree, broadleaf
- filaree, redstem
- filaree, white
- fleabane, annual
- flixweed
- gromwell, common
- groundcherry, smooth
- groundcherry, Wright's
- groundsel, common
- henbit
- jimsonweed
- kochia
- lambsquarters
- lambsquarters, common
- miner's lettuce
- prickly lettuce
- mallow, common
- mallow, venice
- meadowfoam
- morningglory
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, pitted
- morningglory, scarlet
- mustard, blue
- mustard, tansy
- mustard, tumble
- mustard, wild
- nettle, burning
- nightshade, American black
- nightshade, black
- nightshade, eastern black
- nightshade, hairy
- pennycress, field
- pepperweed, greenflower
- pigweed, prostrate
- pigweed, redroot
- pigweed, smooth
- pigweed, triazine resistant
- pigweed, tumble
- potato, volunteer
- primrose, cutleaf
- primrose, tumble
- knotweed, prostrate
- purslane, common
- radish, wild
- ragweed, common
- ragweed, giant
- redmaids
- rocket, london
- sage, lanceleaf
- sesbania, hemp
- shepherd's-purse
- smartweed, pennsylvania
- smartweed, PA seedling
- smartweeds, annual
- sowthistle
- sowthistle, annual
- speedwell
- speedwell, Virginia
- dayflower, benghal
- spurge, prostrate
- star-of-Bethlehem
- sunflower, annual
- sunflower, wild
- tansymustard
- tarweed, coast
- thistle, russian
- thistles, annual and biennial
- velvetleaf
- wallflower, bushy
- waterhemp, common
- wild hemp
Quinark EW 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.
Quinark EW FAQ
What weeds does Quinark EW control?
The Quinark EW label names 99 weeds, including palmer amaranth, spiny amaranth, pigweed, spurred anoda, catchweed bedstraw, and field bindweed. Control varies by crop, rate, and timing.
What crops is Quinark EW labeled for?
Quinark EW is labeled for 40 crops and uses, including field corn, soybeans, wheat, cotton, and sunflower.
What is the active ingredient in Quinark EW? Is it a generic?
Quinark EW's active ingredient is carfentrazone-ethyl (MOA Group 14). 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.