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Osprey 4.5 WDG labeled for weed control in wheat

Osprey 4.5 WDG Herbicide from Bayer CropScience has been registered by the Environmental Protection Agency (EPA) for postemergence control of Italian (annual) ryegrass, wild oat and a broad spectrum of weeds in winter wheat. Registration may be pending in some states. Please consult your state lead agency for information.

“Italian ryegrass and wild oat create big problems for wheat growers from the Pacific Northwest to the Southeast,” says Dave Feist, product manager with Bayer CropScience. “By controlling these profit-robbing weeds, Osprey effectively helps protect yield and grain quality. And it gives growers more rotation flexibility, freedom to plant any winter wheat variety with performance that can be counted on.”

Osprey herbicide combines a new active ingredient called mesosulfuron-methyl and a highly effective safener. At use rates of up to 4.75 ounces per acre, Osprey herbicide controls Italian ryegrass and wild oat, including ACC-ase resistant species, as well as Persian darnel, annual and roughstalk bluegrass, Hood and littleseed canarygrass, blackgrass, windgrass, wild mustard, wild radish and volunteer canola. It also suppresses downy, soft and ripgut brome, hairy chess, henbit, common chickweed and redroot pigweed.

For best results, Osprey must be applied with a high quality spray adjuvant based on specific local recommendations available from your local crop protection retailer. Osprey may also be tank-mixed with Bronate Advanced Herbicide, or other commonly used broadleaf herbicides, for one-pass control.

Osprey may be applied in spring or fall, and has a wide window of application in winter wheat from emergence up to the jointing stage, when weeds are actively growing. All commercially available winter wheat varieties tested in university and on-farm trials exhibit excellent tolerance to Osprey.

With Osprey, growers have excellent flexibility for replanting and rotational crops. Wheat may be replanted seven days after Osprey is applied while barley and sunflowers may be planted 30 days after application.

Soybeans, cotton, rice, lentils, dry beans, peas and peanuts may be planted just 90 days after Osprey is applied. Corn may be planted 12 months after application. All other crops may be planted after ten months.

Mesosulfuron is part of a new generation of sulfonylurea chemistry developed by Bayer CropScience. The new product met rigorous criteria for Reduced Risk status. As a result, the EPA accelerated its review of Osprey to expedite its registration.

“Osprey herbicide is just one of several new products Bayer CropScience is developing for cereal growers,” Feist says.

For more information about Osprey and other Bayer CropScience products, contact your local crop protection retailer or Bayer CropScience representative. You may also visit or call 1-866-992-2937.

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