Herbicide label

Willowood Thionil EC

Willowood Thionil EC (EPA 87290-74) is a Group 5 and 15 propanil and thiobencarb herbicide labeled for 1 crops. The label lists 35 controlled weeds, plus partial-control, suppression, and partner-control categories.

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Official EPA label (PDF)

Willowood Thionil EC label facts

Crops on the Willowood Thionil EC label

Willowood Thionil EC is labeled for these 1 crops and uses, per the EPA label.

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Weeds on the Willowood Thionil EC label

The Willowood Thionil EC label names 36 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
  • barnyardgrass, common
  • coffeebean
  • cockspur, gulf
  • crabgrass
  • croton
  • dayflower
  • ducksalad, small
  • eclipta
  • false pimpernel
  • nutsedge, species
  • foxtail
  • goosegrass
  • sesbania, hemp
  • hoorahgrass
  • indigo
  • jointvetch, indian
  • jointvetch, northern
  • junglerice
  • mexicanweed
  • millet, texas
  • morningglory, pitted
  • nutsedge, yellow
  • panicum, fall
  • paragrass
  • pigweed
  • ammannia, purple
  • sicklepod
  • signalgrass, broadleaf
  • smartweed
  • sourdock, curly dock
  • spearhead
  • spikerush
  • sprangletop
  • waterhyssop
  • wiregrass

Controls with a tank-mix partner

needs partner8
  • coffeebean
  • eclipta
  • indigo
  • morningglory
  • nutsedge, yellow
  • pigweed
  • sicklepod
  • smartweed

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Willowood Thionil 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 and your soil texture.

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Willowood Thionil EC FAQ

What weeds does Willowood Thionil EC control?

The Willowood Thionil EC label names 36 weeds, including common barnyardgrass, coffeebean, gulf cockspur, crabgrass, croton, and dayflower. Control varies by crop, rate, and timing.

What crops is Willowood Thionil EC labeled for?

Willowood Thionil EC is labeled for 1 crops and uses, including rice.

What is the active ingredient in Willowood Thionil EC? Is it a generic?

Willowood Thionil EC's active ingredient is propanil and thiobencarb (MOA Group 5 and 15). Other products list the same active ingredient; rates, formulations, and labeled crops differ — verify each on its own label.

Can I tank-mix Willowood Thionil EC?

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.