How do you kill roots large scotch pine after tree has been cut Dow?

To kill the roots of a large Scotch pine after it has been cut down, you can apply a systemic herbicide containing glyphosate directly to the freshly cut stump. Make sure to do this soon after cutting to maximize effectiveness. Alternatively, you can drill holes into the stump and fill them with concentrated herbicide. This method helps prevent resprouting and ensures the roots die off completely.