Herbicide label

Bromac Herbicide Label

Bromac (EPA 34704-886) is a Group 4 and 6 bromoxynil and mcpa herbicide labeled for 9 crops. The label lists 54 controlled weeds, plus partial-control, suppression, and partner-control categories.

“Bromac herbicide is a mixture of the active ingredients bromoxynil and MCPA.”

— Bromac EPA label, Reg. No. 34704-886

Bromac label facts

Crops on the Bromac label

Bromac is labeled for these 9 crops and uses, per the EPA label.

Weeds on the Bromac label

The Bromac label names 58 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 control54
  • buckwheat, tartary
  • buckwheat, wild
  • cockle, cow
  • cocklebur, common
  • fiddleneck
  • jimsonweed
  • ladysthumb
  • lambsquarters, common
  • marshelder
  • mustard, black
  • mustard, tumble
  • mustard, wild
  • nightshade, black
  • nightshade, cutleaf
  • nightshade, eastern black
  • nightshade, hairy
  • nightshade, silverleaf
  • pennycress, field
  • pepperweed
  • pigweed, redroot
  • pigweed, smooth
  • pigweed, spiny
  • poppy, horned
  • rocket, london
  • rocket, yellow
  • sage, lanceleaf
  • shepherd's-purse
  • smartweed, green
  • smartweed, pennsylvania
  • sowthistle, annual
  • sunflower
  • tarweed, common
  • thistle, russian
  • waterhemp, common
  • chamomile, corn
  • fumitory
  • gromwell, corn
  • groundsel, common
  • henbit
  • knawel
  • knotweed, prostrate
  • kochia
  • mayweed
  • morningglory, ivyleaf
  • morningglory, tall
  • mustard, blue
  • mustard, tansy
  • puncturevine
  • radish, wild
  • ragweed, common
  • ragweed, giant
  • sesbania, hemp
  • tarweed
  • velvetleaf

Suppression

suppression1
  • thistle, canada

Controls with a tank-mix partner

needs partner3
  • chickweed
  • filaree, broadleaf
  • wild oats

Bromac 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.

Bromac FAQ

What weeds does Bromac control?

The Bromac label names 58 weeds, including tartary buckwheat, wild buckwheat, cow cockle, common cocklebur, fiddleneck, and jimsonweed. Control varies by crop, rate, and timing.

What crops is Bromac labeled for?

Bromac is labeled for 9 crops and uses, including wheat, barley, oats, cereal rye, and triticale.

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

Bromac's active ingredient is bromoxynil and mcpa (MOA Group 4 and 6). 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.