Source: New York Times


Palmer amaranth, or pigweed, is a particularly tenacious Roundup-resistant pest that has been known to damage harvesting equipment.

American farmers’ broad use of the weedkiller glyphosphate — particularly Roundup, which was originally made by Monsanto — has led to the rapid growth in recent years of herbicide-resistant weeds. To fight them, farmers are being forced to spray fields with more toxic herbicides, pull weeds by hand and return to more labor-intensive methods like regular plowing. More...

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