Chemicalsamvacimpact-core

Impact CORE

AMVAC · EPA Reg 5481-648 · Herbicide Document last checked 2026-05-30

About this product

Active ingredient Pending extraction
Manufacturer AMVAC
Category Herbicide

Full details for Impact CORE

EPA registration data Reg. 5481-648 — 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. 5481-648 →

Impact CORE is an emulsifiable concentrate (EC) herbicide designed for weed control in field corn, field corn grown for seed, and popcorn. It contains two active ingredients: Acetochlor (77.78%) and Topramezone (0.78%). This product provides systemic control or partial control of many emerged broadleaf weeds and grasses, offering both postemergence control and residual weed control. It can be tank-mixed with other herbicides to broaden its spectrum. When applying, users must follow specific PPE requirements, including long-sleeved shirts, long pants, chemical-resistant gloves (Barrier Laminate or Butyl Rubber), chemical-resistant footwear, protective eyewear, and chemical-resistant headgear/aprons during cleaning. It is important to note that Topramezone can leach into soil and potentially contaminate groundwater, especially in permeable soils with shallow water tables. Acetochlor also has properties associated with groundwater contamination. Always follow the specific directions for use and resistance management strategies provided on the label.

Pests covered (2)
emerged broadleaf weeds and grassesBroadleaf Weeds, Grasses
Areas treatable (1)
field corn, field corn grown for seed, and popcorn

Application instructions from the label 1

field corn, field corn grown for seed, and popcorn

postemergence

Provides systemic or partial control; check Table 1 and 2 for specific weed control ratings and maximum size limits.

Target pest
emerged broadleaf weeds and grasses
Location
Outdoor

Mixing instructions 1

Label notes
May be tank-mixed with other corn herbicides; refer to tank mix directions. Tank-mixing atrazine at 0.25 to 0.5 lb active per acre can enhance control of emerged broadleaf weeds.

Worker safety

Re-entry interval (REI) 12
PPE required Long-sleeved shirt and long pants; Chemical-resistant gloves made of Barrier Laminate, or Butyl Rubber; Chemical-resistant footwear plus socks; Protective eyewear; Chemical-resistant headgear for overhead exposure and chemical-resistant apron when cleaning equipment, mixing, or loading.

Use restrictions 1