Herbicide label

Parazone 3SL

Parazone 3SL (EPA 5481-615) is a Group 22 paraquat herbicide labeled for 24 crops. The label lists 40 controlled weeds, plus partial-control, suppression, and partner-control categories.

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Official EPA label (PDF)

“Parazone 3SL is a contact herbicide that desiccates all green plant tissue.”

— Parazone 3SL EPA label, Reg. No. 5481-615

Parazone 3SL label facts

Crops on the Parazone 3SL label

Parazone 3SL is labeled for these 24 crops and uses, per the EPA label.

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Weeds on the Parazone 3SL label

The Parazone 3SL label names 60 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 control40
  • amaranth, palmer
  • barley
  • barnyardgrass, common
  • beggarweed, florida
  • bluegrass, annual
  • brome, downy
  • brome, rescue
  • cereals, volunteer
  • chickweed
  • cotton, volunteer
  • crabgrass
  • dogfennel
  • fiddleneck
  • foxtail
  • foxtail, giant
  • goosegrass
  • groundcherry, cutleaf
  • groundsel, common
  • henbit
  • johnsongrass, seedling
  • maids, red
  • millet, texas
  • mustard, tansy
  • wild oats
  • panicum, fall
  • pigweed
  • purslane
  • ragweed, common
  • red rice
  • rocket, london
  • ryegrass
  • ryegrass, italian
  • shepherd's-purse
  • sicklepod
  • signalgrass, broadleaf
  • small grain, volunteer
  • sowthistle
  • spikeweed
  • volunteer wheat
  • witchweed

Partial control

partial15
  • cocklebur, common
  • horseweed
  • knotweed
  • kochia
  • lambsquarters
  • prickly lettuce
  • mallow
  • morningglory
  • ragweed, giant
  • sida, prickly
  • smartweed
  • smartweed, pennsylvania
  • spiderwort
  • starbur, bristly
  • velvetleaf

Suppression

suppression5
  • bindweed, hedge
  • dandelion
  • johnsongrass
  • sedges
  • thistle, canada

Weed indexes featuring this label

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Parazone 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.

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Parazone 3SL FAQ

What weeds does Parazone 3SL control?

The Parazone 3SL label names 60 weeds, including palmer amaranth, barley, common barnyardgrass, florida beggarweed, annual bluegrass, and downy brome. Control varies by crop, rate, and timing.

What crops is Parazone 3SL labeled for?

Parazone 3SL is labeled for 24 crops and uses, including field corn, soybeans, wheat, cotton, and sunflower.

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

Parazone 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.

Can I tank-mix Parazone 3SL?

It depends on your target weeds, crop stage, and which partners the label approves. Build a program and FieldMarshal checks the label for approved partners and gives the condition on each, so you can verify it.

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Sources

Last updated 2026-07-14.