Arroz 80

AMVAC · EPA Reg 5481-649 · Herbicide 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. 5481-649 →

Arroz 80 CA is a Group 2 herbicide containing 80.0% Bispyribac-sodium. It is designed specifically for use on rice in California only. This product acts as a postemergence herbicide that controls selected weeds by inhibiting the ALS (acetolactate synthase) enzyme. Because it is a contact herbicide with no systemic activity, weeds must be fully and completely covered during application to ensure effectiveness; otherwise, weed regrowth may occur. It can be applied via aircraft (with a total spray volume of 10 gallons or greater) or by ground equipment (with a total spray volume of 15 to 25 gallons or greater). Users should be mindful of spray drift, especially in windy conditions, and follow specific buffer zone requirements for different application types and locations. The label emphasizes the importance of droplet size and nozzle selection to maximize coverage and minimize drift. Note that this product is toxic to non-target plants and should not be applied directly to water or areas where surface water is present.

Pests covered (1)

selected weeds

Areas treatable (1)

rice

Application instructions from the label 1

rice

Postemergence application; weeds must be fully and completely covered.

Target pest: selected weeds
Location: Outdoor

Mixing instructions 1

Label notes
When using Water Soluble Packages (WSPs), follow specific agitation and mixing instructions to ensure complete dissolution.

Worker safety

Re-entry interval (REI) 12

PPE required Long-sleeved shirt and long pants; Chemical-resistant gloves (Barrier Laminate, Butyl Rubber $\ge$ 14 mils, or Nitrile Rubber $\ge$ 14 mils, or Viton $\ge$ 14 mils); Shoes plus socks.

Timing & weather

Do not apply if wind speed is greater than 8 mph.
Avoid application during temperature inversions.

Use restrictions 3

For use on rice in California only.
Do not apply directly to water or areas where surface water is present or to intertidal areas below the mean high water mark.
Do not apply in a way that will contact workers or other persons, directly or through drift.

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.