Herbicide label
Authority Edge
Authority Edge (EPA 279-9643) is a Group 14 and 15 pyroxasulfone and sulfentrazone herbicide labeled for 4 crops. The label lists 55 controlled weeds, plus partial-control, suppression, and partner-control categories.
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Authority Edge label facts
- Product Authority Edge
- EPA Reg. No. 279-9643
- Registrant FMC Corporation
- Active ingredient pyroxasulfone and sulfentrazone
- MOA group 14 and 15
Crops on the Authority Edge label
Authority Edge 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 Authority Edge label
The Authority Edge label names 75 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 control55- amaranth, palmer
- amaranth, powell
- amaranth, spiny
- amaranth, spleen
- barnyardgrass, common
- bluegrass, annual
- canarygrass
- carpetweed
- copperleaf, hophornbeam
- crabgrass
- crowfootgrass
- cupgrass, prairie
- cupgrass, southwestern
- foxtail, bristly
- foxtail, giant
- foxtail, green
- foxtail, robust
- foxtail, yellow
- galinsoga, hairy
- goosegrass
- groundcherry, cutleaf
- jimsonweed
- johnsongrass, seedling
- kochia
- lambsquarters, common
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, palmleaf
- morningglory, pitted
- morningglory, purple
- morningglory, red
- morningglory, scarlet
- morningglory, smallflower
- morningglory, tall
- nightshade, black
- nightshade, eastern black
- panicum, fall
- panicum, texas
- pigweed, redroot
- pigweed, smooth
- pigweed, spiny
- pigweed, tumble
- purslane, common
- pusley, florida
- red rice
- ryegrass, italian
- ryegrass, rigid
- sida, prickly
- signalgrass, broadleaf
- smartweed, pennsylvania
- spiderwort, tropical
- star of bethlehem
- thistle, russian
- waterhemp, common
- witchgrass
Partial control
partial17- brome, downy
- brome, japanese
- buckwheat, wild
- cheat
- chickweed, common
- cupgrass, woolly
- fleabane, common
- groundsel, common
- henbit
- horseweed
- millet, wild-proso
- wild oats
- orach, spreading
- ragweed, common
- sandbur, longspine
- shattercane
- velvetleaf
Suppression
suppression3- nutsedge, purple
- nutsedge, yellow
- sedge, annual
Want the control level for your crop, or to filter 1,700+ labels by any of these weeds? Use the free label filter.
Authority Edge 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.
Authority Edge FAQ
What weeds does Authority Edge control?
The Authority Edge label names 75 weeds, including palmer amaranth, powell amaranth, spiny amaranth, spleen amaranth, common barnyardgrass, and annual bluegrass. Control varies by crop, rate, and timing.
What crops is Authority Edge labeled for?
Authority Edge is labeled for 4 crops and uses, including soybeans, sunflower, field pea, and chickpea.
What is the active ingredient in Authority Edge? Is it a generic?
Authority Edge's active ingredient is pyroxasulfone and sulfentrazone (MOA Group 14 and 15). 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 Authority Edge?
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 Authority Edge?
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 Authority Edge and let FieldMarshal build a defensible herbicide program for your field, every product, rate, and plant-back cross-referenced and checked against the label.
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Sources
Last updated 2026-07-14.