Herbicide label
Prequel Herbicide Label
Prequel (EPA 352-779) is a Group 2 and 27 isoxaflutole and rimsulfuron herbicide labeled for 2 crops. The label lists 59 controlled weeds, plus partial-control, suppression, and partner-control categories.
“PREQUEL® is absorbed through the roots of plants, rapidly inhibiting the growth of susceptible weeds.”
Prequel label facts
- Product Prequel
- EPA Reg. No. 352-779
- Registrant Corteva Agriscience
- Active ingredient isoxaflutole and rimsulfuron
- MOA group 2 and 27
Crops on the Prequel label
Prequel is labeled for these 2 crops and uses, per the EPA label.
Weeds on the Prequel label
The Prequel label names 69 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 control59- alfalfa
- amaranth, palmer
- barley
- barnyardgrass, common
- bluegrass, annual
- buffalobur
- burcucumber
- carpetweed
- chamomile, false
- chickweed, common
- cocklebur, common
- crabgrass, large
- crabgrass, smooth
- cupgrass, woolly
- dandelion
- filaree, redstem
- foxtail, bristly
- foxtail, giant
- foxtail, green
- foxtail, yellow
- galinsoga
- goosegrass
- henbit
- jimsonweed
- johnsongrass, seedling
- kochia
- lambsquarters, common
- mallow, venice
- horseweed
- millet, wild-proso
- morningglory, ivyleaf
- mustard, birdsrape
- mustard, black
- mustard, wild
- nightshade, black
- nightshade, hairy
- wild oats
- panicum, fall
- panicum, texas
- pigweed, prostrate
- pigweed, redroot
- pigweed, smooth
- plantain, broadleaf
- purslane, common
- radish, wild
- ragweed, common
- ragweed, giant
- sandbur
- shattercane
- shepherd's-purse
- signalgrass, broadleaf
- smartweed, pennsylvania
- spurge, toothed
- sunflower
- thistle, russian
- velvetleaf
- waterhemp, common
- volunteer wheat
- witchgrass
Partial control
partial5- nutsedge, yellow
- quackgrass
- ryegrass, italian
- stinkgrass
- thistle, canada
Controls with a tank-mix partner
needs partner10- buckwheat, wild
- crabgrass
- nutsedge, yellow
- quackgrass
- ryegrass, italian
- sandbur, field
- sandbur, longspine
- stinkgrass
- thistle, canada
- deadnettle, purple
Prequel 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.
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.
Prequel FAQ
What weeds does Prequel control?
The Prequel label names 69 weeds, including alfalfa, palmer amaranth, barley, common barnyardgrass, annual bluegrass, and buffalobur. Control varies by crop, rate, and timing.
What crops is Prequel labeled for?
Prequel is labeled for 2 crops and uses, including field corn and corn silage.
What is the active ingredient in Prequel? Is it a generic?
Prequel's active ingredient is isoxaflutole and rimsulfuron (MOA Group 2 and 27). Other products list the same active ingredient; rates, formulations, and labeled crops differ — verify each on its own label.
Sources
Last updated 2026-09-30.