Herbicide label

Paraquat 3SL Herbicide Label

Paraquat 3SL (EPA 93809-4) is a Group 22 paraquat herbicide labeled for 27 crops. The label lists 35 controlled weeds, plus partial-control, suppression, and partner-control categories.

Paraquat 3SL label facts

Crops on the Paraquat 3SL label

Paraquat 3SL is labeled for these 27 crops and uses, per the EPA label.

Weeds on the Paraquat 3SL label

The Paraquat 3SL label names 53 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 control35
  • barley
  • barnyardgrass, common
  • crabgrass
  • fiddleneck
  • foxtail, giant
  • goosegrass
  • groundcherry, cutleaf
  • johnsongrass, seedling
  • maids, red
  • millet, texas
  • panicum, fall
  • pigweed
  • purslane
  • ragweed, common
  • red rice
  • sicklepod
  • signalgrass, broadleaf
  • spikeweed
  • volunteer wheat
  • witchweed
  • bluegrass, annual
  • brome, downy
  • chickweed
  • groundsel, common
  • brome, rescue
  • dogfennel
  • foxtail
  • henbit
  • wild oats
  • rocket, london
  • ryegrass
  • shepherd's-purse
  • sowthistle
  • tansymustard
  • ryegrass, italian

Partial control

partial13
  • cocklebur, common
  • horseweed
  • knotweed
  • kochia
  • lambsquarters
  • mallow
  • morningglory
  • ragweed, giant
  • sedges
  • sida, prickly
  • smartweed, pennsylvania
  • starbur, bristly
  • velvetleaf

Suppression

suppression5
  • bindweed, hedge
  • dandelion
  • johnsongrass
  • thistle, canada
  • prickly lettuce

Paraquat 3SL 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.

Paraquat 3SL FAQ

What weeds does Paraquat 3SL control?

The Paraquat 3SL label names 53 weeds, including barley, common barnyardgrass, crabgrass, fiddleneck, giant foxtail, and goosegrass. Control varies by crop, rate, and timing.

What crops is Paraquat 3SL labeled for?

Paraquat 3SL is labeled for 27 crops and uses, including field corn, soybeans, wheat, cotton, and sunflower.

What is the active ingredient in Paraquat 3SL? Is it a generic?

Paraquat 3SL's active ingredient is paraquat (MOA Group 22). 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.