Voles have a very keen sense of smell, which we can use to help drive them away. In this way, voles can be driven away with unpleasant smells, for example butyric acid. Learn how to use butyric acid against voles below.

The problem with the butyric acid
Butyric acid is a chemical that is odorless in its original form. When the chemical comes into contact with air and moisture, it produces a strong odor reminiscent of rancid butter - hence the name. Butyric acid is a very effective vole repellent because of the stench, but the acid is not entirely safe for both humans and voles. Butyric acid is corrosive to the respiratory system and irritating to the skin. What causes only slight irritation in humans if handled improperly can lead to severe burns to the eyes, respiratory tract or skin of voles.
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A good alternative to butyric acid is buttermilk, which also develops a strong odor. To get the best effect, don't skimp on buttermilk.
Repel vole with butyric acid
Repelling a vole with butyric acid or buttermilk is easy:
- First, you should identify as many holes in the vole as possible and select one hole as an "escape hole". This hole should be as close as possible to the property line and should not be touched.
- When using butyric acid, be sure to wear long clothing, gloves, and safety glasses.
- Dig up the entrances and put a few drops of butyric acid on a rag. Push the rag into the vole entrance. If you use buttermilk, soak the rag in it.
- Repeat the process for all other holes - except for the escape hole.
- To prevent the vole from coming back, you can repeat the process two or three times at two-week intervals.
Alternatives to butyric acid
Voles can also be repelled with other strong-smelling agents, e.g. nettle manure, elderberry tea, garlic, essential oils or smelly fish heads.
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