Repeated Sublethal Rates of Glyphosate Lead to Decreased Sensitivity in Palmer Amaranth
J. K. Norsworthy
Glyphosate-resistant Palmer amaranth is the result of over-reliance on glyphosate for weed control in glyhosate-resistant crops. The use of lower-than-recommended rates of glyphosate is associated with the development of glyphosate resistance; however, the impact of low rates of glyphosate on development of glyphosate-resistant Palmer amaranth is lacking, and hence, an experiment was conducted to determine if glyphosate-resistant Palmer amaranth could be selected through treatment of plants with sublethal glyphosate rates.
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