Herbicide label
League Herbicide Label
League (EPA 59639-166) is a Group 2 imazosulfuron herbicide labeled for 2 crops. The label lists 24 controlled weeds, plus partial-control, suppression, and partner-control categories.
“League Herbicide is a selective herbicide which provides contact and residual control of susceptible weeds in labeled crops.”
League label facts
- Product League
- EPA Reg. No. 59639-166
- Registrant Valent U. S. A. LLC
- Active ingredient imazosulfuron
- MOA group 2
Crops on the League label
League is labeled for these 2 crops and uses, per the EPA label.
Weeds on the League label
The League label names 36 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 control24- buckwheat, wild
- galinsoga, hairy
- lambsquarters, common
- morningglory
- purslane, common
- ragweed, common
- turnip, wild
- croton, woolly
- dayflower
- eclipta
- gourd, texas
- groundcherry, cutleaf
- sesbania, hemp
- horseweed
- jointvetch, indian
- jointvetch, northern
- morningglory, pitted
- nutsedge, yellow
- pigweeds (except livid)
- texasweed
- ducksalad
- flatsedge, rice
- ammannia, purple
- ricefield bulrush
Suppression
suppression12- barnyardgrass, common
- nettle, burning
- crabgrass, large
- foxtail, giant
- groundsel, common
- mayweed
- nightshade, black
- shepherd's-purse
- smartweed, pennsylvania
- sowthistle
- thistle, russian
- nutsedge, purple
League 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.
League FAQ
What weeds does League control?
The League label names 36 weeds, including wild buckwheat, hairy galinsoga, common lambsquarters, morningglory, common purslane, and common ragweed. Control varies by crop, rate, and timing.
What crops is League labeled for?
League is labeled for 2 crops and uses, including potato and rice.
What is the active ingredient in League? Is it a generic?
League's active ingredient is imazosulfuron (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.