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Syngenta Field Report

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The Syngenta Field Report features information and experts from Syngenta sharing observations about issues growers are dealing with in the fields.

Glyphosate-resistant weeds are spreading

Nov 17, 2009

Glyphosate-tolerant crops have revolutionized agriculture, making glyphosate one of the most important tools you have to manage your crops.  However, weed resistance, especially to glyphosate, continues to be a real and growing problem in the U.S. 


According to estimates, more than seven million row crop acres were infested with glyphosate-resistant weeds last year.  And with an expected 40 percent average compounded annual growth rate, more than 38 million row crop acres could be infested with glyphosate-resistant weeds by 2013.


To combat this development, I recommend overlapping, integrated weed control strategies:

·        Rotate crops

·        Use more than one mode of action for weed control

·        Keep crops as weed-free as possible throughout the season; strive for effective, season-long weed control


Since 2001, Syngenta has fought on the front lines in the battle against glyphosate resistance, advising that over reliance on glyphosate herbicides would lead to resistance – and it clearly has. For more details, visit resistancefighter.com.

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