Herbicide label
Fierce Herbicide Label
Fierce (EPA 59639-193) is a Group 14 and 15 flumioxazin and pyroxasulfone herbicide labeled for 4 crops. The label lists 59 controlled weeds, plus partial-control, suppression, and partner-control categories.
Fierce label facts
- Product Fierce
- EPA Reg. No. 59639-193
- Registrant Valent U. S. A. LLC
- Active ingredient flumioxazin and pyroxasulfone
- MOA group 14 and 15
Crops on the Fierce label
Fierce is labeled for these 4 crops and uses, per the EPA label.
Weeds on the Fierce label
The Fierce label names 79 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 control59- barnyardgrass, common
- bluegrass, annual
- brome, downy
- carpetweed
- cheat
- chickweed, common
- chickweed, mouseear
- crabgrass, large
- crabgrass, smooth
- cupgrass, southwestern
- dandelion
- eclipta
- eveningprimrose, cutleaf
- flatsedge, rice
- foxtail, giant
- foxtail, green
- foxtail, yellow
- goosegrass
- henbit
- jimsonweed
- johnsongrass, seedling
- kochia
- lambsquarters, common
- lovegrass, california
- mallow, little
- mallow, venice
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, red
- morningglory, scarlet
- morningglory, smallflower
- morningglory, tall
- mustard, wild
- nightshade, black
- nightshade, eastern black
- nightshade, hairy
- panicum, fall
- panicum, texas
- amaranth, palmer
- pigweed, redroot
- pigweed, smooth
- pigweed, tumble
- sida, prickly
- puncturevine
- purslane, common
- pusley, florida
- radish, wild
- ragweed, common
- red rice
- redmaids
- ryegrass, italian
- ryegrass, rigid
- senna, coffee
- sesbania, hemp
- shepherd's-purse
- signalgrass, broadleaf
- spurge, spotted
- velvetleaf
- waterhemp, common
Suppression
suppression14- anoda, spurred
- beggarweed, florida
- buckwheat, wild
- copperleaf, hophornbeam
- croton, tropic
- crownbeard, golden
- indigo, hairy
- ragweed, giant
- smartweed, ladysthumb
- smartweed, pennsylvania
- starbur, bristly
- thistle, russian
- poinsettia, wild
- wormwood, biennial
Controls with a tank-mix partner
needs partner10- bindweed, field
- cocklebur, common
- beggarweed, florida
- morningglory, pitted
- plantain, broadleaf
- ragweed, giant
- sicklepod
- smartweed, ladysthumb
- smartweed, pale
- smartweed, pennsylvania
Fierce 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.
Fierce FAQ
What weeds does Fierce control?
The Fierce label names 79 weeds, including common barnyardgrass, annual bluegrass, downy brome, carpetweed, cheat, and common chickweed. Control varies by crop, rate, and timing.
What crops is Fierce labeled for?
Fierce is labeled for 4 crops and uses, including field corn, soybeans, cotton, and fallow.
What is the active ingredient in Fierce? Is it a generic?
Fierce's active ingredient is flumioxazin and pyroxasulfone (MOA Group 14 and 15). 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.