Herbicide label
Assure II Herbicide Label
Assure II (EPA 5481-646) is a Group 1 quizalofop-p-ethyl herbicide labeled for 20 crops. The label lists 35 controlled weeds, plus partial-control, suppression, and partner-control categories.
“ASSURE II is a systemic herbicide that is rapidly absorbed by treated foliage and translocated to the roots and other growing points of the plant.”
Assure II label facts
- Product Assure II
- EPA Reg. No. 5481-646
- Registrant Amvac Chemical Corporation
- Active ingredient quizalofop-p-ethyl
- MOA group 1
Crops on the Assure II label
Assure II is labeled for these 20 crops and uses, per the EPA label.
Weeds on the Assure II label
The Assure II label names 35 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- barley
- barnyardgrass, common
- bermudagrass
- brome, downy
- corn, volunteer
- crabgrass, large
- crabgrass, smooth
- crowfootgrass
- cupgrass, woolly
- foxtail, bristly
- foxtail, giant
- foxtail, green
- foxtail, yellow
- goatgrass, jointed
- goosegrass
- junglerice
- millet, wild-proso
- muhly, wirestem
- wild oats
- oats
- panicum, fall
- panicum, texas
- quackgrass
- red rice
- rye, volunteer
- ryegrass, italian
- sandbur, field
- shattercane
- signalgrass, broadleaf
- sprangletop
- volunteer wheat
- windgrass, common
- witchgrass
- rhizome johnsongrass
- johnsongrass, seedling
Assure II 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.
Assure II FAQ
What weeds does Assure II control?
The Assure II label names 35 weeds, including barley, common barnyardgrass, bermudagrass, downy brome, volunteer corn, and large crabgrass. Control varies by crop, rate, and timing.
What crops is Assure II labeled for?
Assure II is labeled for 20 crops and uses, including field corn, soybeans, cotton, sunflower, and sugar beet.
What is the active ingredient in Assure II? Is it a generic?
Assure II's active ingredient is quizalofop-p-ethyl (MOA Group 1). 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.