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  1. stikine

    Can Tree Roots Breach A Heavy Plastic Liner?

    I'm not sure. It's quite effective on willow and alder when they are cut and the copper is applied afterwards.
  2. stikine

    Can Tree Roots Breach A Heavy Plastic Liner?

    Copper is your friend here. Tack a penny or piece of copper flashing to the cut surface of the stem and it will die off.
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