FirstRate

AMVAC · EPA Reg 5481-676 · Herbicide Document last checked 2026-05-30

About this product

Active ingredient Pending extraction

Manufacturer AMVAC

Category Herbicide

Full details for FirstRate

EPA registration data Reg. 5481-676 — registry reference, signal word and status.

Applicator discussion

Nothing here is label direction — the label is the law. These are notes from other applicators, moderated before they appear. Check the labeling accompanying the product and applicable state requirements.

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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. 5481-676 →

FirstRate is a Group 2 herbicide containing 84% active ingredient cloransulam-methyl. It is specifically designed for the control of broadleaf weeds in soybeans. It can be applied as a preplant, preemergence, or postemergence herbicide. The product is effective when applied to soybeans, but users must be cautious of iron chlorosis in certain geographic areas. For optimal results, follow specific crop rotation intervals: soybeans require 0 months, wheat requires 4 months, alfalfa/field corn/popcorn/seed corn require 9 months, barley requires 12 months, potatoes/sweet corn require 18 months, and tobacco/other crops require 18 months. When mixing with other herbicides, ensure compatibility via a jar test. Avoid application during windy conditions (speeds > 10 mph) or temperature inversions to prevent spray drift. Do not apply near water or where surface water can reach non-target areas. Always wear required PPE, including long-sleeved shirts, long pants, chemical-resistant gloves (butyl, natural, neoprene, or nitrile), and shoes plus socks.

Pests covered (1)

broadleaf weeds

Areas treatable (1)

soybeans

How to treat each type of area 1

soybeans

Target pest	Location	Rate	Unit	Label notes
broadleaf weeds	Outdoor	0.75 oz per acre (preplant/preemergence) or 0.3 oz per acre (postemergence)	oz	Do not exceed 0.039 lb active ingredient cloransulam-methyl per acre for preplant/preemergence. Do not exceed 0.03 lb active ingredient per acre for postemergence. Aerial application is prohibited in New York State.

Mixing instructions 1

Label notes
When mixing with liquid fertilizer, mix FirstRate in a slurry of product and clean water using 1 gallon of water per container of FirstRate before adding to the tank. For tank mixes, follow specific directions for other products and perform a jar test for compatibility.

Worker safety

Re-entry interval (REI) 12

PPE required Long-sleeved shirt and long pants; Chemical-resistant gloves (butyl rubber ≥14 mils, natural rubber ≥14 mils, neoprene rubber ≥14 mils, or nitrile rubber > 14 mils); Shoes plus socks.

Timing & weather

Avoid application during windy conditions (speeds > 10 mph). Avoid application during temperature inversions. Do not apply if rainfall is forecast within 48 hours.

Use restrictions 1

Do not apply within 25 days of harvest. Do not apply within 70 days before harvest for soybeans. Do not apply near water or where surface water can reach non-target areas. Do not apply in New York State via aerial application. Do not apply if wind speed is greater than 10 mph. Avoid application during temperature inversions.