Herbicide label

Smash Herbicide Label

Smash (EPA 83529-338) is a Group 27 topramezone herbicide labeled for 7 crops. The label lists 39 controlled weeds, plus partial-control, suppression, and partner-control categories.

Download the label PDF

“Smash is absorbed by leaves, roots, and shoots and translocated to the growing points of sensitive weeds to control emerged weeds. Smash controls weeds by inhibiting carotenoid biosynthesis (HPPD-inhibitor Group 27).”

— Smash EPA label, Reg. No. 83529-338

Smash label facts

Crops on the Smash label

Smash is labeled for these 7 crops and uses, per the EPA label.

Weeds on the Smash label

The Smash label names 51 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 control39
  • amaranth, palmer
  • amaranth, powell
  • barnyardgrass, common
  • burcucumber
  • volunteer canola
  • carpetweed
  • chickweed, common
  • cocklebur, common
  • crabgrass, large
  • crabgrass, smooth
  • foxtail, giant
  • goosegrass
  • horseweed
  • jimsonweed
  • kochia
  • lambsquarters, common
  • prickly lettuce
  • mallow, common
  • millet, wild-proso
  • mustard
  • nightshade, black
  • nightshade, eastern black
  • nightshade, hairy
  • pigweed, prostrate
  • pigweed, redroot
  • pigweed, smooth
  • pigweed, tumble
  • pusley, florida
  • ragweed, common
  • ragweed, giant
  • shepherd's-purse
  • sida, prickly
  • smartweed, ladysthumb
  • smartweed, pennsylvania
  • sunflower
  • sunflower, wild
  • thistle, russian
  • velvetleaf
  • waterhemp, common

Partial control

partial4
  • dandelion
  • mallow, venice
  • morningglory
  • thistle, canada

Suppression

suppression8
  • bermudagrass, common
  • cupgrass, woolly
  • panicum, fall
  • foxtail, green
  • foxtail, yellow
  • johnsongrass, seedling
  • shattercane
  • signalgrass, broadleaf

Weed indexes featuring this label

Smash 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.

Smash FAQ

What weeds does Smash control?

The Smash label names 51 weeds, including palmer amaranth, powell amaranth, common barnyardgrass, burcucumber, volunteer canola, and carpetweed. Control varies by crop, rate, and timing.

What crops is Smash labeled for?

Smash is labeled for 7 crops and uses, including field corn, corn silage, seed corn, popcorn, and sweet corn.

What is the active ingredient in Smash? Is it a generic?

Smash's active ingredient is topramezone (MOA Group 27). 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.