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Glyphosate-Resistant Weeds Spreading

In 2007, glyphosate-resistant waterhemp was confirmed in southern Minnesota. It has now spread to west-central Minnesota and continues to increase in frequency due to the continued planting of Monsanto’s Round-up Ready crops and exclusive use of glyphosate.

In 2010, glyphosate-resistant giant ragweed was first confirmed on Ontario farms in Essex County.

Irrigators in the Ord Valley of western Australia are attempting to tackle the ongoing issue of patches of awnless barnyard grass, which have developed a resistance to glyphosate.

Next month, the University of Tennessee will hold a Weed Tour, covering research on management of glyphosate-resistant horseweed and amaranth.

After more than a decade of discussions about glyphosate resistant weeds, three glyphosate-resistant species (horseweed, waterhemp and giant ragweed) have been verified in Iowa. Research conducted by Iowa State and others has confirmed glyphosate-resistance in isolated fields across Iowa.

Just as the heavy use of antibiotics contributed to the rise of drug-resistant supergerms, American farmers’ near-ubiquitous use of the weedkiller Roundup has led to the rapid growth of tenacious new superweeds.

Mother Nature is pretty clever. So when are we going to smarten up?

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