Herbicide label
Definite Herbicide Label
Definite (EPA 83529-105) is a Group 2, 4, and 15 acetochlor, clopyralid, and flumetsulam herbicide labeled for 2 crops. The label lists 64 controlled weeds, plus partial-control, suppression, and partner-control categories.
Definite label facts
- Product Definite
- EPA Reg. No. 83529-105
- Registrant Sharda USA LLC
- Active ingredient acetochlor, clopyralid, and flumetsulam
- MOA group 2, 4, and 15
Crops on the Definite label
Definite is labeled for these 2 crops and uses, per the EPA label.
Weeds on the Definite label
The Definite label names 64 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 control64- amaranth, palmer
- barnyardgrass, common
- beggarweed, florida
- buckwheat, wild
- carpetweed
- chickweed, common
- clover, red
- cocklebur, common
- crabgrass spp.
- crowfootgrass
- cupgrass, prairie
- cupgrass, southwestern
- cupgrass, woolly
- foxtail, bristly
- foxtail, giant
- foxtail, green
- foxtail, robust
- foxtail, yellow
- galinsoga
- goosegrass
- henbit
- horseweed
- jimsonweed
- johnsongrass, seedling
- kochia
- ladysthumb
- lambsquarters, common
- mallow, venice
- foxtail, millet
- millet, wild-proso
- morningglory, ivyleaf
- morningglory, tall
- mustard, wild
- nightshade spp.
- nutsedge, yellow
- panicum, browntop
- panicum, fall
- panicum, texas
- pigweed, redroot
- pigweed, smooth
- poinsettia, wild
- puncturevine
- purslane, common
- pusley, florida
- ragweed, common
- ragweed, giant
- red rice
- sandbur, field
- shattercane
- shepherd's-purse
- sicklepod
- sida, prickly
- signalgrass, broadleaf
- smartweed, pennsylvania
- sprangletop, red
- spurge, nodding
- spurge, prostrate
- spurge, spotted
- sunflower, annual
- thistle, canada
- velvetleaf
- waterhemp, common
- witchgrass
- wormwood, biennial
Definite 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.
Definite FAQ
What weeds does Definite control?
The Definite label names 64 weeds, including palmer amaranth, common barnyardgrass, florida beggarweed, wild buckwheat, carpetweed, and common chickweed. Control varies by crop, rate, and timing.
What crops is Definite labeled for?
Definite is labeled for 2 crops and uses, including field corn and corn silage.
What is the active ingredient in Definite? Is it a generic?
Definite's active ingredient is acetochlor, clopyralid, and flumetsulam (MOA Group 2, 4, 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.