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Waterhemp’s big, bad brother is back this spring

Palmer amaranth has been confirmed in five Iowa counties over the last two summers. The only (known) infestation in Muscatine County is on a very sandy soil near the Cedar River, and most emerged seedlings had at least four true leaves on May 4, 2015.

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Slowing the further development of pesticide resistance

Resistance management is a recurrent topic in many Extension publications and programs. Although resistance is certainly not new to agriculture, we tend to think about it only after a significant "resistance" outbreak. This is unfortunate because in so many cases resistance can be avoided, or at least slowed.

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Glyphosate-resistant Palmer amaranth confirmed in SW Nebraska

Palmer amaranth continues to cause significant problems in the Mid-South and has rapidly spread throughout the Midwest. As of 2015, glyphosate-resistant Palmer amaranth has been confirmed in Georgia, North Carolina, Arkansas, Tennessee, South Carolina, New Mexico, Mississippi, Alabama, Missouri, Louisiana, Illinois, Ohio, Kentucky, Michigan, Virginia, Kansas, Texas, Arizona, Delaware, Indiana, Pennsylvania, Florida, Maryland, New Jersey, and Wisconsin.

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U.S. court fight over herbicide widens to 15 states

A court fight over use of a new Dow Chemical herbicide on genetically engineered U.S. corn and soybean crops is growing to encompass 15 Midwestern states after the company recently won federal approval for more widespread application.

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