There are several ways to chemically kill a tree, including using herbicides, copper sulfate and potassium chloride, and all-purpose herbicides. Here are some of the most common methods:

• Herbicides: Glyphosate and imazapyr kill plants by interfering with the synthesis of proteins produced only by plants, while triclopyr amine and triclopyr ester are growth regulator-type herbicides. Always follow label instructions and practice cautionary recommendations, including wearing eye and skin protection.

• Copper sulfate and potassium chloride: The Bordeaux mixture contains copper sulfate and potassium chloride, which combine with moisture from the soil to form a compound called cupric hydroxide. This chemical can get into the bark of a tree and kill off cells that allow for proper growth, resulting in death.

• All-purpose herbicides: Any glyphosate-based herbicide will kill tree roots. Just make sure you’re wearing a respirator, gloves, and long sleeves when you apply it. Follow the instructions on the product you purchase and apply the herbicide to the roots of the tree. You can either apply the herbicide to the soil surrounding the tree or dig out the soil to expose the roots and apply the herbicide directly.

Its important to note that these solutions are not the best eco-friendly option. There are natural methods that can also do the job, such as repeatedly spraying a seedling with undiluted vinegar or girdling or frilling a larger tree.