Assure II

CaroVail · Petroleum Distillate · EPA Reg 5481-646 · Insecticide Document last checked 2026-05-30

According to the label From the product label

These details were extracted from this product's label PDF. The label is the law. Confirm every rate, site, restriction and safety requirement against the label before mixing or applying. Check for a state supplemental label; a product may be restricted or prohibited in a state or site even when a rate appears below. · EPA registration data for Reg. 5481-646 →

Assure II is a systemic herbicide used for the control of various annual and perennial grasses. The active ingredient is Quizalofop-p-ethyl (10.3% by weight), which works by inhibiting the enzyme acetyl-CoA carboxylase (ACCase) in grasses. It is designed for use on various crops, including corn, soybeans, wheat, and more, as well as non-crop areas like fence rows and roadsides. The product can be applied as a solo application or tank-mixed with broadleaf herbicides, though specific precautions apply. For spot treatments of small areas, a 0.375% v/v solution is required using either a crop oil concentrate or a nonionic surfactant. Users should be aware that the product contains petroleum distillates; avoid contact with eyes, skin, or clothing, and do not induce vomiting if swallowed. It is critical to follow weed resistance management practices, such as rotating herbicides with different modes of action, to prevent resistance development.

Pests covered (1)

Annual and perennial grasses

Areas treatable (1)

Crops (e.g., corn, soybeans, wheat, etc.) and non-crop areas (e.g., fence rows, roadsides)

Application instructions from the label 1

Crops (e.g., corn, soybeans, wheat, etc.) and non-crop areas (e.g., fence rows, roadsides)

Systemic herbicide; controls grasses by inhibiting ACCase.

Target pest: Annual and perennial grasses
Location: Both

Mixing instructions 1

For pests	Location	Per	Finished strength	Label notes
Small area spot treatments	Outdoor	1 gallon	0.375% v/v	Use either 1.25 fl oz crop oil concentrate OR 0.3 fl oz nonionic surfactant per gallon of water.

Worker safety

Re-entry interval (REI) 12

PPE required Long-sleeved shirt and long pants, chemical-resistant gloves (barrier laminate or Viton ≥14 mils), shoes plus socks, and protective eyewear.

Timing & weather

Avoid applying when rainfall is forecast to occur within 48 hours.
Avoid applying to grasses under stress (e.g., drought, temperature extremes).

Use restrictions 4

Do not feed forage, hay, or straw from treated areas to livestock unless otherwise stated.
Do not apply through irrigation equipment.
Do not contaminate any body of water.
Do not use on lawns, walks, driveways, tennis courts, or similar areas.

Label SDS

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Document text and citations

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Reference only. Always read and follow the most current EPA-approved label on the product container. State and local restrictions may apply that are not reflected in this digitised copy. Verify the EPA registration number and revision date before use.