Herbicide label

SHADOW 3EC

SHADOW 3EC (EPA 70506-500) is a Group 1 clethodim herbicide labeled for 25 crops. The label lists 53 controlled weeds, plus partial-control, suppression, and partner-control categories.

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Official EPA label (PDF)

“SHADOW 3EC Herbicide is a selective postemergence herbicide for control of annual and perennial grasses.”

— SHADOW 3EC EPA label, Reg. No. 70506-500

SHADOW 3EC label facts

Crops on the SHADOW 3EC label

SHADOW 3EC is labeled for these 25 crops and uses, per the EPA label.

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Weeds on the SHADOW 3EC label

The SHADOW 3EC label names 56 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 control53
  • barnyardgrass, common
  • bentgrass
  • bermudagrass
  • bluegrass, annual
  • bluegrass, kentucky
  • bluegrass, perennial
  • bluegrass, roughstalk
  • brome, california
  • brome, cheat
  • brome, downy
  • brome, ripgut
  • canarygrass
  • corn, volunteer
  • crabgrass, hairy
  • crabgrass, large
  • crabgrass, smooth
  • crabgrass, southern
  • crowfootgrass
  • cupgrass, southwestern
  • cupgrass, woolly
  • fescue, tall
  • foxtail barley
  • foxtail, giant
  • foxtail, green
  • foxtail, yellow
  • goosegrass
  • rhizome johnsongrass
  • johnsongrass, seedling
  • junglerice
  • lovegrass, stinkgrass
  • millet, wild-proso
  • muhly, wirestem
  • oats
  • wild oats
  • orchardgrass
  • panicum, fall
  • panicum, texas
  • quackgrass
  • rabbitsfootgrass
  • red rice
  • rye, volunteer
  • ryegrass, hardy
  • ryegrass, italian
  • sandbur, field
  • shattercane
  • signalgrass, broadleaf
  • sorghum, volunteer grain
  • sprangletop, amazon
  • sprangletop, bearded
  • sprangletop, mexican
  • sprangletop, red
  • volunteer wheat
  • witchgrass

Suppression

suppression3
  • annual grasses
  • fescue, tall seed-heads
  • perennial grasses

Weed indexes featuring this label

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SHADOW 3EC 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, the rotational crop, and your state, region, and rainfall — some intervals differ in ID, NY, OR, and WA.

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.

SHADOW 3EC FAQ

What weeds does SHADOW 3EC control?

The SHADOW 3EC label names 56 weeds, including common barnyardgrass, bentgrass, bermudagrass, annual bluegrass, kentucky bluegrass, and perennial bluegrass. Control varies by crop, rate, and timing.

What crops is SHADOW 3EC labeled for?

SHADOW 3EC is labeled for 25 crops and uses, including field corn, soybeans, cotton, sunflower, and potato.

What is the active ingredient in SHADOW 3EC? Is it a generic?

SHADOW 3EC's active ingredient is clethodim (MOA Group 1). 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 SHADOW 3EC?

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 SHADOW 3EC?

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.

Other registrations of SHADOW 3EC