Herbicide label
PETRA 4SC Herbicide Label
PETRA 4SC (EPA 89168-48-91395) is a Group 14 sulfentrazone herbicide labeled for 21 crops. The label lists 88 controlled weeds, plus partial-control, suppression, and partner-control categories.
“Sulfentrazone the active ingredient in PETRA 4SC is a potent inhibitor of the enzyme Protoporphyrinogen Oxidase IX (PPO IX) required for the formation of chlorophyll Inhibition of PPO IX enzyme results in the liberation of singlet oxygen (0) that in turn disrupts cellular membranes and causes cellular leakage. The ultimate manifestation of the process is cellular death leading to plant death.”
PETRA 4SC label facts
- Product PETRA 4SC
- EPA Reg. No. 89168-48-91395
- Distributor Altitude Crop Innovations, LLC.
- Active ingredient sulfentrazone
- MOA group 14
Crops on the PETRA 4SC label
PETRA 4SC is labeled for these 21 crops and uses, per the EPA label.
Weeds on the PETRA 4SC label
The PETRA 4SC label names 88 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 control88- amaranth, livid
- amaranth, spiny
- buckwheat, wild
- cockle, white
- carpetweed
- chickweed, common
- copperleaf, virginia
- crabgrass, smooth
- cupgrass, woolly
- cyperus, hedgehog
- daisy, american
- dock, curly
- flixweed
- groundcherry, clammy
- groundcherry, cutleaf
- groundsel, common
- knotweed, prostrate
- ladysthumb
- miner's lettuce
- mallow, common
- milkweed, honeyvine
- mustard, tumble
- orchardgrass
- panicum, fall
- pansy, field
- pineapple-weed
- plantain, blackseed
- plantain, narrow-leaved
- poorjoe
- porophyllum
- redmaids
- sedge, annual
- sida, southern
- smellmelon
- spurry, corn
- starbur, bristly
- stinkgrass
- tassleflower, red
- waterprimrose, winged
- witchgrass
- woodsorrel, yellow
- amaranth, palmer
- amaranth, powell
- bedstraw, catchweed
- mayweed, chamomile
- shepherd's-purse
- toadflax, yellow
- amaranth, spleen
- anoda, spurred
- cocklebur, common
- crabgrass, large
- crabgrass, southern
- croton, tropic
- crownbeard, golden
- devilsclaw
- eclipta
- goosegrass
- jimsonweed
- nutsedge, purple
- poinsettia, wild
- purslane, common
- redweed
- senna, coffee
- signalgrass, broadleaf
- smartweed, pennsylvania
- starbur, prickly
- copperleaf, hophornbeam
- filaree, redstem
- galinsoga, hairy
- kochia
- lambsquarters, common
- morningglory, entireleaf
- morningglory, ivyleaf
- morningglory, palmleaf
- morningglory, purple
- morningglory, scarlet
- nightshade, black
- morningglory, pitted
- morningglory, smallflower
- morningglory, red
- morningglory, tall
- nightshade, eastern black
- nutsedge, yellow
- pigweed, redroot
- pigweed, smooth
- sida, prickly
- thistle, russian
- waterhemp, common
PETRA 4SC 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.
PETRA 4SC FAQ
What weeds does PETRA 4SC control?
The PETRA 4SC label names 88 weeds, including livid amaranth, spiny amaranth, wild buckwheat, white cockle, carpetweed, and common chickweed. Control varies by crop, rate, and timing.
What crops is PETRA 4SC labeled for?
PETRA 4SC is labeled for 21 crops and uses, including field corn, soybeans, sunflower, potato, and peanut.
What is the active ingredient in PETRA 4SC? Is it a generic?
PETRA 4SC's active ingredient is sulfentrazone (MOA Group 14). 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.