How to Kill Leeches in My Yard
- 1). Pour salt directly on the body of any leeches found outside the water. The salt will dry out the leech's body and kill it.
- 2). Spray lemon juice on the ground, tree or other areas where the leeches are found. Lemon juice is effective at killing the leeches.
- 3). Measure 5 ppm, or parts per million, of copper sulfate. Copper sulfate is available at many garden supply stores, and comes complete with a measuring cup that indicates parts per million.
- 4). Pour 5 ppm of copper sulfate into the pond or small water source to kill the leeches.