How does glyphosate primarily move within a plant?

Glyphosate primarily moves within a plant in the sugar flow. This is due to its systemic nature, allowing it to be absorbed by the leaves and then translocated throughout the plant via the phloem, which is responsible for transporting sugars and other metabolites. When glyphosate is applied to the foliage, it is taken up, enters the vascular system, and moves to growth points where new tissues are formed, effectively targeting the portions of the plant that are actively growing.

This movement is crucial for glyphosate's effectiveness as an herbicide since it allows for widespread distribution throughout the plant, including roots and other parts, leading to the disruption of critical metabolic functions in all areas of the plant. This systemic action is what contributes to glyphosate's efficacy as a non-selective herbicide.