Herbicide label
Dual II Magnum Herbicide Label
Dual II Magnum (EPA 100-818) is a Group 15 metolachlor herbicide labeled for 19 crops. The label lists 42 controlled weeds, plus partial-control, suppression, and partner-control categories.
Dual II Magnum label facts
- Product Dual II Magnum
- EPA Reg. No. 100-818
- Registrant Syngenta Crop Protection, LLC
- Active ingredient metolachlor
- MOA group 15
Crops on the Dual II Magnum label
Dual II Magnum is labeled for these 19 crops and uses, per the EPA label.
Weeds on the Dual II Magnum label
The Dual II Magnum label names 54 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 control42- amaranth, palmer
- amaranth, powell
- barnyardgrass, common
- bentgrass
- bluegrass, annual
- bluegrass, kentucky
- bluegrass, roughstalk
- brome, california
- brome, downy
- carpetweed
- crabgrass, large
- crabgrass, smooth
- crowfootgrass
- cupgrass, prairie
- cupgrass, southwestern
- fine fescue
- rattail fescue
- fescue, tall
- foxtail, bristly
- foxtail, giant
- foxtail, green
- foxtail, millet
- foxtail, yellow
- galinsoga, hairy
- galinsoga, smallflower
- goosegrass
- nightshade, eastern black
- nutsedge, yellow
- orchardgrass
- panicum, fall
- pigweed, prostrate
- pigweed, redroot
- pigweed, smooth
- pigweed, tumble
- pusley, florida
- red rice
- ryegrass, italian
- ryegrass, perennial
- signalgrass, broadleaf
- dayflower, benghal
- waterhemp, common
- witchgrass
Partial control
partial12- beggarweed, florida
- cupgrass, woolly
- eclipta
- johnsongrass, seedling
- millet, wild-proso
- nightshade, hairy
- panicum, texas
- purslane, common
- sandbur, field
- sandbur, southern
- shattercane
- sorghum, volunteer
Dual 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.
Dual II Magnum FAQ
What weeds does Dual II Magnum control?
The Dual II Magnum label names 54 weeds, including palmer amaranth, powell amaranth, common barnyardgrass, bentgrass, annual bluegrass, and kentucky bluegrass. Control varies by crop, rate, and timing.
What crops is Dual II Magnum labeled for?
Dual II Magnum is labeled for 19 crops and uses, including field corn, soybeans, cotton, sunflower, and potato.
What is the active ingredient in Dual II Magnum? Is it a generic?
Dual II Magnum's active ingredient is metolachlor (MOA Group 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.