IDAHO WHEAT COMMISSION

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U of I weed scientist sees looming threat in herbicide-resistant pigweed

University of Idaho Extension weed specialist Albert Adjesiwor is warning the agricultural industry about a looming problem for Idaho farmers — herbicide-resistant pigweeds that tower over commercial crops in fields.  Palmer Amaranth commonly grows 6 to 8 feet tall and can exceed 10 feet in height, wreaking havoc on surrounding crop yields.

It’s also evolved to tolerate most common herbicides, including glyphosate.  Native to the desert southwest, Palmer amaranth is now widespread throughout the continental U.S., except for the Pacific Northwest, Montana and a few states in the northeast. Adjesiwor is advocating quick preventative actions to stave off the troublesome weed’s arrival to the Gem State.  The weed could be introduced into Idaho through cover crop blends or contaminated hay, or cottonseed meal imported from other states as livestock feed.