Herbicide label
Peak Herbicide Label
Peak (EPA 100-763) is a Group 2 prosulfuron herbicide labeled for 14 crops. The label lists 50 controlled weeds, plus partial-control, suppression, and partner-control categories.
“Peak is a selective herbicide applied after emergence of both crop and weeds for the control of broadleaf weeds in field corn, sorghum, winter wheat, spring wheat, barley, rye, oats, triticale, proso millet, and postemergence to weeds following small grain harvest.”
Peak label facts
- Product Peak
- EPA Reg. No. 100-763
- Registrant Syngenta Crop Protection, LLC
- Active ingredient prosulfuron
- MOA group 2
Crops on the Peak label
Peak is labeled for these 14 crops and uses, per the EPA label.
Weeds on the Peak label
The Peak label names 68 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 control50- amaranth, palmer
- bindweed, hedge
- buckwheat, wild
- buffalobur
- buttercup, hairy
- mayweed, chamomile
- cocklebur, common
- eveningprimrose, cutleaf
- fiddleneck
- flixweed
- garlic, wild
- kochia
- lambsquarters, common
- prickly lettuce
- mallow, venice
- mustard, blue
- mustard, tumble
- mustard, wild
- pennycress, field
- pigweed, redroot
- pigweed, smooth
- pigweed, tumble
- radish, wild
- ragweed, common
- shepherd's-purse
- sunflower, annual
- tansymustard
- thistle, russian
- beggarweed, florida
- devil's claw
- jimsonweed
- ladysthumb
- puncturevine
- pusley, florida
- ragweed, giant
- sesbania, hemp
- sicklepod
- sida, prickly
- smartweed, pennsylvania
- velvetleaf
- waterhemp, common
- carpetweed
- copperleaf, hophornbeam
- morningglory, smallflower
- purslane, common
- purslane, horse
- chervil, bur
- miner's lettuce
- pineapple-weed
- wallflower, bushy
Partial control
partial13- bindweed, field
- chickweed, common
- henbit
- mallow, common
- thistle, canada
- horseweed
- morningglory, ivyleaf
- morningglory, pitted
- morningglory, tall
- chickweed, mouseear
- gromwell, corn
- knotweed, prostrate
- burcucumber
Controls with a tank-mix partner
needs partner5- dogbane, hemp
- nightshades
- carelessweed
- pigweed
- thistles
Peak 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.
Peak FAQ
What weeds does Peak control?
The Peak label names 68 weeds, including palmer amaranth, hedge bindweed, wild buckwheat, buffalobur, hairy buttercup, and chamomile mayweed. Control varies by crop, rate, and timing.
What crops is Peak labeled for?
Peak is labeled for 14 crops and uses, including field corn, wheat, barley, sorghum, and corn silage.
What is the active ingredient in Peak? Is it a generic?
Peak's active ingredient is prosulfuron (MOA Group 2). 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.