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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.

Time-tested herbicide atrazine helps manage resistance

Oct 15, 2010

Chuck Foresman

Applying multiple modes of action is one key to managing against glyphosate weed resistance. And alternative modes of action to add to glyphosate can be as basic as a 50-year-old herbicide like atrazine
According to a Kansas corn grower, “We need to rotate herbicides to help control weeds, especially glyphosate-tolerant weeds…and atrazine is one option we use.” An Illinois grower agrees, “We also use atrazine to provide a different mode of action for weed control.  We don’t want to develop weed resistance.”

Some weeds have developed resistance to atrazine, but used in combination with other herbicide modes of action, it is an effective resistance management tool.

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