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http://www.democraticunderground.com/discuss/duboard.php?az=show_mesg&forum=102&topic_id=2657916&mesg_id=2657916AP: (Roundup)-resistant weed worries farmers
http://hosted.ap.org/dynamic/stories/M/MONSTER_WEEDDec 18, 9:29 PM EST
Herbicide-resistant weed worries farmers
By ELLIOTT MINOR
Associated Press Writer
TIFTON, Ga. (AP) -- The cotton industry is concerned about the discovery of a herbicide-resistant weed that spreads easily, can grow an inch a day even during droughts and could force farmers to return to older growing methods that were harsher on the environment.
"It is potentially the worse threat since the boll weevil," said Alan York, weed scientist at North Carolina State University in Raleigh, referring to the voracious beetle that devastated Southern cotton crops in the early 1900s and forced farmers to switch to alternatives such as peanuts.
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The weed that is causing concern is Palmer amaranth, a type of pig weed that grows 6 to 10 feet tall. Amaranth that resists the most common herbicide used in cotton, glyphostate, has been confirmed in 10 of North Carolina's 100 counties, four of Georgia's 159 counties and is suspected in Tennessee, South Carolina and Arkansas, scientists say.
If someone were trying to design a particularly nasty weed, Palmer amaranth could be the model, York said.
"It's an extremely competitive weed," he said. "It's extremely prolific. It's an efficient ... bad weed."
In Georgia, where the weed has been confirmed in 48 fields, amaranth took over some fields and the cotton had to be cut down, rather than harvested, said University of Georgia weed scientist Stanley Culpepper. The weed can damage cotton pickers, the huge machines that pluck the world's leading natural fiber from the cotton bolls.
Glyphostate is sold under several brand names, but the leading product is Roundup, made by Monsanto.
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