Herbicide label
Impact CORE
Impact CORE (EPA 5481-648) is a Group 15 and 27 acetochlor and topramezone herbicide labeled for 4 crops. The label lists 46 controlled weeds, plus partial-control, suppression, and partner-control categories.
Build the herbicide program for your field
Tell FieldMarshal your crop, weeds, and rotation. Get back a complete program, products, rates, plant-back, and tank-mix, with every line checked against the label so you can verify it yourself.
Built from 1,700+ EPA herbicide labels and 49 state weed-control guides. Made for crop advisors and growers.
Free to create your account. Every line references the label, so you can check it against the source.
Impact CORE label facts
- Product Impact CORE
- EPA Reg. No. 5481-648
- Registrant Amvac Chemical Corporation
- Active ingredient acetochlor and topramezone
- MOA group 15 and 27
Crops on the Impact CORE label
Impact CORE is labeled for these 4 crops and uses, per the EPA label.
Need the rate or timing for one of these? Filter every label by your crop, free.
Weeds on the Impact CORE label
The Impact CORE label names 62 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 control46- amaranth, palmer
- amaranth, powell
- barnyardgrass, common
- burcucumber
- volunteer canola
- carpetweed
- chickweed, common
- cocklebur, common
- crabgrass, large
- crabgrass, smooth
- cupgrass, woolly
- foxtail, giant
- foxtail, green
- foxtail, yellow
- galinsoga, hairy
- goosegrass
- henbit
- horseweed
- jimsonweed
- johnsongrass, seedling
- kochia
- lambsquarters, common
- prickly lettuce
- mallow, common
- millet, wild-proso
- mustard spp.
- nightshade, black
- nightshade, eastern black
- nightshade, hairy
- panicum, fall
- pigweed, prostrate
- pigweed, redroot
- pigweed, smooth
- pigweed, tumble
- pusley, florida
- ragweed, common
- ragweed, giant
- shepherd's-purse
- sida, prickly
- signalgrass, broadleaf
- smartweed, ladysthumb
- smartweed, pennsylvania
- sunflower, wild
- thistle, russian
- velvetleaf
- waterhemp, common
Partial control
partial16- beggarweed, florida
- cupgrass, prairie
- cupgrass, southwestern
- dandelion
- foxtail, millet
- morningglory
- mallow, venice
- wild oats
- panicum, browntop
- panicum, texas
- purslane, common
- red rice
- sandbur
- shattercane
- thistle, canada
- witchgrass
Want the control level for your crop, or to filter 1,700+ labels by any of these weeds? Use the free label filter.
Impact CORE 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 and your soil texture.
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.
Impact CORE FAQ
What weeds does Impact CORE control?
The Impact CORE label names 62 weeds, including palmer amaranth, powell amaranth, common barnyardgrass, burcucumber, volunteer canola, and carpetweed. Control varies by crop, rate, and timing.
What crops is Impact CORE labeled for?
Impact CORE is labeled for 4 crops and uses, including field corn, corn silage, seed corn, and popcorn.
What is the active ingredient in Impact CORE? Is it a generic?
Impact CORE's active ingredient is acetochlor and topramezone (MOA Group 15 and 27). Other products list the same active ingredient; rates, formulations, and labeled crops differ — verify each on its own label.
What's the plant-back interval after Impact CORE?
It depends on your rotational crop, application rate, and region, so the label gives a table, not one number. Build a program and FieldMarshal gives you the exact interval for your rotation from the label line, so you can verify it.
Build a program →Can I tank-mix Impact CORE?
It depends on your target weeds, crop stage, and which partners the label approves. Build a program and FieldMarshal checks the label for approved partners and gives the condition on each, so you can verify it.
Build a program →Plan in minutes, not hours.
Start with Impact CORE and let FieldMarshal build a defensible herbicide program for your field, every product, rate, and plant-back cross-referenced and checked against the label.
Free account and label filter. Building a program is paid, metered by use, so you pay only for what you build.
Sources
Last updated 2026-07-14.