Herbicide label
Osprey Herbicide Label
Osprey (EPA 264-802) is a Group 2 mesosulfuron-methyl herbicide labeled for 4 crops. The label lists 15 controlled weeds, plus partial-control, suppression, and partner-control categories.
“OSPREY Herbicide is absorbed through the foliage of plants, rapidly inhibiting growth of susceptible weeds.”
Osprey label facts
- Product Osprey
- EPA Reg. No. 264-802
- Registrant Bayer CropScience, LLC
- Active ingredient mesosulfuron-methyl
- MOA group 2
Crops on the Osprey label
Osprey is labeled for these 4 crops and uses, per the EPA label.
Weeds on the Osprey label
The Osprey label names 28 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 control15- blackgrass
- bluegrass, annual
- bluegrass, kentucky
- bluegrass, roughstalk
- canarygrass, hood
- canarygrass, littleseed
- volunteer canola
- darnel, persian
- mustard, tumble
- mustard, wild
- wild oats
- pennycress, field
- radish, wild
- ryegrass, annual
- windgrass, common
Suppression
suppression13- bluegrass, bulbous
- brome, downy
- brome, japanese
- brome, ripgut
- brome, soft
- cheat
- chess, hairy
- chickweed, common
- goatgrass, jointed
- henbit
- pigweed, redroot
- quackgrass
- ventenata
Osprey 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.
Osprey FAQ
What weeds does Osprey control?
The Osprey label names 28 weeds, including blackgrass, annual bluegrass, kentucky bluegrass, roughstalk bluegrass, hood canarygrass, and littleseed canarygrass. Control varies by crop, rate, and timing.
What crops is Osprey labeled for?
Osprey is labeled for 4 crops and uses, including wheat, winter wheat, triticale, and durum wheat.
What is the active ingredient in Osprey? Is it a generic?
Osprey's active ingredient is mesosulfuron-methyl (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 2026-09-17.