Herbicide label

Drexel AquaPen 3.8

Drexel AquaPen 3.8 (EPA 19713-698) is a Group 3 pendimethalin herbicide labeled for 25 crops. The label lists 59 controlled weeds, plus partial-control, suppression, and partner-control categories.

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Official EPA label (PDF)

Drexel AquaPen 3.8 label facts

Crops on the Drexel AquaPen 3.8 label

Drexel AquaPen 3.8 is labeled for these 25 crops and uses, per the EPA label.

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Weeds on the Drexel AquaPen 3.8 label

The Drexel AquaPen 3.8 label names 67 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
  • amaranth, palmer
  • barnyardgrass, common
  • bluegrass, annual
  • brome, downy
  • brome, japanese
  • bugloss, small
  • canarygrass
  • carpetweed
  • cheat
  • chess, hairy
  • chickweed, common
  • crabgrass
  • crowfootgrass
  • cupgrass, woolly
  • dodder
  • fescue, volunteer
  • fiddleneck
  • fingergrass, swollen
  • foxtail, giant
  • foxtail, green
  • foxtail, yellow
  • goatgrass, jointed
  • goosegrass
  • henbit
  • johnsongrass, seedling
  • junglerice
  • knotweed, prostrate
  • kochia
  • lady's thumb
  • lambsquarters, common
  • lambsquarters, slimleaf
  • lovegrass species
  • millet, wild-proso
  • mustard, black
  • stinging nettle
  • wild oats
  • panicum, browntop
  • panicum, fall
  • panicum, texas
  • pigweed
  • puncturevine
  • purslane
  • pusley, florida
  • red rice
  • rocket, london
  • ryegrass, annual
  • ryegrass, italian
  • ryegrass, volunteer
  • sandbur, field
  • shattercane
  • shepherd's-purse
  • signalgrass
  • smartweed, pennsylvania
  • sprangletop, mexican
  • sprangletop, red
  • spurge, annual
  • velvetleaf
  • waterhemp, common
  • witchgrass

Suppression

suppression8
  • morningglory
  • nightshade, black
  • nightshade, hairy
  • ammannia, purple
  • sedge, smallflower umbrella
  • thistle, russian
  • watergrass, early
  • watergrass, late

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Drexel AquaPen 3.8 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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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.

Drexel AquaPen 3.8 FAQ

What weeds does Drexel AquaPen 3.8 control?

The Drexel AquaPen 3.8 label names 67 weeds, including palmer amaranth, common barnyardgrass, annual bluegrass, downy brome, japanese brome, and small bugloss. Control varies by crop, rate, and timing.

What crops is Drexel AquaPen 3.8 labeled for?

Drexel AquaPen 3.8 is labeled for 25 crops and uses, including field corn, soybeans, wheat, cotton, and sunflower.

What is the active ingredient in Drexel AquaPen 3.8? Is it a generic?

Drexel AquaPen 3.8'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.

What's the plant-back interval after Drexel AquaPen 3.8?

It depends on your rotational crop, application rate, and region, so the label gives a table, not one number. Build a program and FieldMarshal gives you the exact interval for your rotation from the label line, so you can verify it.

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Can I tank-mix Drexel AquaPen 3.8?

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.