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How to Kill a Tree with Copper Sulfate
How to Kill a Tree with Copper Sulfate. Copper sulphate is a poison often used to discourage tree roots from growing into vulnerable areas such as sewer lines. It can, however, kill a whole tree if it is properly applied. Although you may be able to kill a tree by putting copper sulfate on the ground around it, the sulphate is toxic to the water...
Copper sulphate is a poison often used to discourage tree roots from growing into vulnerable areas such as sewer lines. It can, however, kill a whole tree if it is properly applied. Although you may be able to kill a tree by putting copper sulfate on the ground around it, the sulphate is toxic to the water supply and the ground, so this technique should be avoided. Instead, use the copper sulphate to poison the tree more directly.
Things You'll Need
Knife
Drill
Funnel
Copper sulfate
Peel back an inch or two of bark near the base of the tree. If the bark is too thick to peel, cut three sides of a square with a knife, opening up a small tab of bark.
Drill a hole in the tree at a downward angle under the bark. The longer and wider the hole, the more copper sulfate you will be able to pour in and the quicker you will be able to poison the tree.
Stick a funnel in the hole. Pour in copper sulfate until the hole is almost filled.
Remove the funnel and push the bark back into place to prevent the copper sulfate from being washed out by rain.
