Herbicide label
Bicep II Magnum Herbicide Label
Bicep II Magnum (EPA 100-817) is a Group 5 and 15 atrazine and metolachlor herbicide labeled for 4 crops. The label lists 37 controlled weeds, plus partial-control, suppression, and partner-control categories.
“Bicep II Magnum is a selective herbicide labeled for preplant, preemergence, or postemergence control of many annual grasses and broadleaf weeds in corn.”
Bicep II Magnum label facts
- Product Bicep II Magnum
- EPA Reg. No. 100-817
- Registrant Syngenta Crop Protection, LLC
- Active ingredient atrazine and metolachlor
- MOA group 5 and 15
Crops on the Bicep II Magnum label
Bicep II Magnum is labeled for these 4 crops and uses, per the EPA label.
Weeds on the Bicep II Magnum label
The Bicep II Magnum label names 43 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 control37- barnyardgrass, common
- carpetweed
- chickweed
- cocklebur, common
- crabgrass
- crowfootgrass
- cupgrass, prairie
- cupgrass, southwestern
- flixweed
- foxtail, giant
- foxtail, green
- foxtail, yellow
- galinsoga
- goosegrass
- henbit
- jimsonweed
- kochia
- lambsquarters
- foxtail, millet
- morningglory
- mustard
- nightshade, black
- nutsedge, yellow
- panicum, browntop
- panicum, fall
- pigweed
- purslane, common
- pusley, florida
- ragweed, common
- ragweed, giant
- red rice
- sida, prickly
- signalgrass
- smartweed
- velvetleaf
- waterhemp, common
- witchgrass
Partial control
partial6- cupgrass, woolly
- johnsongrass, seedling
- sandbur
- shattercane
- sicklepod
- sorghum, volunteer
Bicep II Magnum 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.
Bicep II Magnum FAQ
What weeds does Bicep II Magnum control?
The Bicep II Magnum label names 43 weeds, including common barnyardgrass, carpetweed, chickweed, common cocklebur, crabgrass, and crowfootgrass. Control varies by crop, rate, and timing.
What crops is Bicep II Magnum labeled for?
Bicep II Magnum is labeled for 4 crops and uses, including field corn, sorghum, sweet corn, and fallow.
What is the active ingredient in Bicep II Magnum? Is it a generic?
Bicep II Magnum's active ingredient is atrazine and metolachlor (MOA Group 5 and 15). 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.