Herbicide label

Parallel Plus Herbicide Label

Parallel Plus (EPA 66222-132) is a Group 5 and 15 atrazine and metolachlor herbicide labeled for 4 crops. The label lists 34 controlled weeds, plus partial-control, suppression, and partner-control categories.

Parallel Plus label facts

Crops on the Parallel Plus label

Parallel Plus is labeled for these 4 crops and uses, per the EPA label.

Weeds on the Parallel Plus label

The Parallel Plus label names 46 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 control34
  • barnyardgrass, common
  • carpetweed
  • chickweed
  • cocklebur, common
  • crabgrass
  • crowfootgrass
  • cupgrass, prairie
  • cupgrass, southwestern
  • foxtail, giant
  • foxtail, green
  • foxtail, yellow
  • galinsoga
  • goosegrass
  • henbit
  • jimsonweed
  • kochia
  • lambsquarters
  • foxtail, millet
  • morningglory
  • mustard
  • nightshade, black
  • panicum, browntop
  • panicum, fall
  • pigweed
  • pusley, florida
  • ragweed, common
  • ragweed, giant
  • red rice
  • sida, prickly
  • signalgrass
  • smartweed
  • velvetleaf
  • waterhemp, common
  • witchgrass

Partial control

partial7
  • cupgrass, woolly
  • johnsongrass, seedling
  • nutsedge, yellow
  • sandbur
  • shattercane
  • sicklepod
  • sorghum, volunteer

Suppression

suppression5
  • alfalfa
  • bromegrass species
  • orchardgrass
  • cereal rye
  • timothy

Parallel Plus 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.

Parallel Plus FAQ

What weeds does Parallel Plus control?

The Parallel Plus label names 46 weeds, including common barnyardgrass, carpetweed, chickweed, common cocklebur, crabgrass, and crowfootgrass. Control varies by crop, rate, and timing.

What crops is Parallel Plus labeled for?

Parallel Plus is labeled for 4 crops and uses, including field corn, sorghum, sweet corn, and fallow.

What is the active ingredient in Parallel Plus? Is it a generic?

Parallel Plus's active ingredient is atrazine and metolachlor (MOA Group 5 and 15). 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.