What method is used in frill or hatchet treatments for applying herbicides?

Frill or hatchet treatments involve making downward ax cuts around the base of a tree, which allows for the effective application of herbicides. This method is specifically designed to target woody plants and trees by creating openings in the bark to facilitate the uptake of the herbicide. The cuts are typically made through the cambium layer to optimize absorption, ensuring that the chemical penetrates effectively and reaches the vascular system of the plant.

This targeted application minimizes the risk of off-target damage to surrounding vegetation since the herbicide is applied selectively to the tree being treated. By focusing on the base of the tree and utilizing the trunk's natural pathways for nutrient and water transport, the treatment promotes efficient movement of the herbicide throughout the plant, leading to more successful control of unwanted tree species or invasive plants.