Herbicide label

Prowl 3.3 EC Herbicide Label

Prowl 3.3 EC (EPA 241-337) is a Group 3 pendimethalin herbicide labeled for 18 crops. The label lists 40 controlled weeds, plus partial-control, suppression, and partner-control categories.

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“Prowl 3.3 EC is a meristematic inhibitor that interferes with the plant's cellular division or mitosis. This and/or other products with the meristematic inhibiting mode of action may not effectively control naturally occurring biotypes of some of the weeds listed on this label.”

— Prowl 3.3 EC EPA label, Reg. No. 241-337

Prowl 3.3 EC label facts

Crops on the Prowl 3.3 EC label

Prowl 3.3 EC is labeled for these 18 crops and uses, per the EPA label.

Weeds on the Prowl 3.3 EC label

The Prowl 3.3 EC label names 59 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
  • barnyardgrass, common
  • bluegrass, annual
  • carpetweed
  • crabgrass
  • crowfootgrass
  • dodder
  • fiddleneck
  • foxtail, giant
  • foxtail, green
  • foxtail, yellow
  • goosegrass
  • henbit
  • johnsongrass, seedling
  • junglerice
  • kochia
  • knotweed, prostrate
  • lady's thumb
  • lambsquarters, common
  • lambsquarters, slimleaf
  • lovegrass species
  • mustard, black
  • panicum, browntop
  • panicum, fall
  • panicum, texas
  • pigweed
  • puncturevine
  • purslane
  • pusley, florida
  • red rice
  • sandbur, field
  • shattercane
  • sprangletop
  • sprangletop, mexican
  • sprangletop, red
  • spurge, annual
  • stinging nettle
  • swollen fingergrass
  • waterhemp, common
  • witchgrass

Suppression

suppression19
  • brome, downy
  • brome, japanese
  • bugloss, small
  • canarygrass
  • cheat
  • chess, hairy
  • chickweed, common
  • cupgrass, woolly
  • goatgrass, jointed
  • millet, wild-proso
  • morningglory
  • wild oats
  • rocket, london
  • ryegrass, italian
  • shepherd's-purse
  • signalgrass
  • smartweed, pennsylvania
  • thistle, russian
  • velvetleaf

Weed indexes featuring this label

Prowl 3.3 EC 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.

Prowl 3.3 EC FAQ

What weeds does Prowl 3.3 EC control?

The Prowl 3.3 EC label names 59 weeds, including palmer amaranth, common barnyardgrass, annual bluegrass, carpetweed, crabgrass, and crowfootgrass. Control varies by crop, rate, and timing.

What crops is Prowl 3.3 EC labeled for?

Prowl 3.3 EC is labeled for 18 crops and uses, including field corn, soybeans, cotton, sunflower, and potato.

What is the active ingredient in Prowl 3.3 EC? Is it a generic?

Prowl 3.3 EC's active ingredient is pendimethalin (MOA Group 3). 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.