Which of the following herbicides is linked to Palmer amaranth resistance?

Glyphosate is identified as the herbicide linked to Palmer amaranth resistance due to its widespread and repeated use in agricultural settings. Palmer amaranth is a highly adaptive and aggressive weed species that has developed resistance mechanisms against glyphosate, primarily because it has been the go-to herbicide for many crops. This resistance stems from the over-reliance on glyphosate, leading to selection pressure that favors individual plants with genetic mutations allowing them to survive glyphosate applications.

As farmers and land managers continued to apply glyphosate to manage this weed, those resistant plants proliferated, resulting in populations that can no longer be effectively controlled by this herbicide. This situation emphasizes the importance of integrated weed management practices, which involve rotating herbicides with different modes of action and incorporating cultural practices to prevent resistance development.

In contrast, endothall, fluridone, and diquat are less commonly associated with Palmer amaranth resistance since they are utilized in more specific contexts or different weed management strategies and are not the primary herbicides used against this weed in agricultural systems.