Attack of the Superweeds: Herbicides are losing the war — and agriculture might never be the same again. - Superweeds — that is, weeds that have evolved characteristics that make them more difficult to control as a result of repeatedly using the same management tactic — are rapidly overtaking American commodity farms, and Palmer amaranth is their king.
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The weeds in the test plot were resisting some weed killers their ancestors had never seen.
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