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Posted 2 April 2017. PMN Crop News.

Chateau Herbicide SW Receives Label Expansion

New use includes bearing citrus and caneberries

Source: Valent U.S.A. Press Release.

Walnut Creek, California (March 30, 2017)--Valent U.S.A. Corporation today announced the federally approved label expansion for Chateau® Herbicide SW to include citrus and caneberries. The registration is a new key use for Chateau in bearing citrus fruit.


Chateau is a broad spectrum preemergence herbicide offering growers long-lasting residual protection against more than 90 annual weeds, including tough-to-control broadleaf and annual grasses such as fleabane, Florida pusley, lambsquarters, ragweeds, pigweeds and teaweed.

After previously being registered in non-bearing citrus, Chateau is now labeled for bearing citrus, including oranges, grapefruits, lemons and limes, in Florida, Texas and Arizona. Additionally, the supplemental label also allows Chateau to be used on caneberries such as blackberries and raspberries in the key-producing states of Oregon and Washington.

John Pawlak, product development manager at Valent, said this label update will bring growers greater options for reliable weed-control strategies.

"This expanded use pattern provides a valuable new tool to citrus and caneberry growers looking for proven and dependable control of yield-robbing winter annual weeds with excellent crop safety," Pawlak said. "Chateau is unique in that it stays where you put it and won’t volatilize or co-distillate upward — and it won’t leach. It stays where the weeds germinate to provide consistent and long-term control."

Pawlak added that Chateau is farm friendly and weather ready. Unlike other preemergence herbicides, Chateau does not photodegrade by sunlight after application. With staying power under various weather conditions, Chateau only needs a quarter-inch of water or rainfall for activation.

Chateau has been used commercially since 2005 and can be applied on more than 50 crops. In addition to its new use on bearing citrus and caneberries, Chateau is registered on pome fruit, stone fruit, grapes, tree nuts, tree fruit, sweet potatoes, alfalfa, cotton, blueberries and strawberries.

The ideal use pattern for Chateau on caneberries is a dormant preemergence use, but it can be applied within seven days of harvest. Growers will experience the most benefit from Chateau with a late fall or early spring application, before the weeds emerge and compete with the crop for nutrients.

For more information on Chateau, visit or contact your local Valent retailer or sales representative.