Herbicide label

Patriot Herbicide Label

Patriot (EPA 228-391) is a Group 2 metsulfuron-methyl herbicide labeled for 8 crops. The label lists 36 controlled weeds, plus partial-control, suppression, and partner-control categories.

“Patriot is absorbed primarily through the foliage of plants, and by the roots to a lesser degree.”

— Patriot EPA label, Reg. No. 228-391

Patriot label facts

Crops on the Patriot label

Patriot is labeled for these 8 crops and uses, per the EPA label.

Weeds on the Patriot label

The Patriot label names 49 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 control36
  • buttercup, bur
  • catchfly, conical
  • chamomile, false
  • chickweed, common
  • coreopsis, plains
  • cowcockle
  • falseflax, smallseed
  • fiddleneck
  • filaree, broadleaf
  • flixweed
  • groundsel, common
  • henbit
  • kochia
  • lambsquarters, common
  • lambsquarters, slimleaf
  • miner's lettuce
  • prickly lettuce
  • mayweed, chamomile
  • mustard, blue
  • mustard, tansy
  • mustard, treacle
  • mustard, tumble
  • mustard, wild
  • pennycress, field
  • pigweed, redroot
  • pigweed, smooth
  • pigweed, tumble
  • purslane, common
  • shepherd's-purse
  • smartweed, green
  • smartweed, ladysthumb
  • smartweed, pale
  • speedwell, snow
  • sunflower
  • thistle, russian
  • waterpod

Suppression

suppression6
  • buckwheat, wild
  • gromwell, corn
  • knotweed, prostrate
  • sowthistle, annual
  • sunflower, annual
  • thistle, canada

Controls with a tank-mix partner

needs partner8
  • cocklebur, common
  • horseweed
  • sunflower, annual
  • sunflower, wild
  • wild oats
  • pigweed
  • velvetleaf
  • puncturevine

Patriot 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.

Patriot FAQ

What weeds does Patriot control?

The Patriot label names 49 weeds, including bur buttercup, conical catchfly, false chamomile, common chickweed, plains coreopsis, and cowcockle. Control varies by crop, rate, and timing.

What crops is Patriot labeled for?

Patriot is labeled for 8 crops and uses, including wheat, barley, sorghum, spring wheat, and winter wheat.

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

Patriot's active ingredient is metsulfuron-methyl (MOA Group 2). 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.