One method used is quite natural, organic you could just say. The rest of this article on how to get rid of voles makes mention of the conventional means. As far as natural means go, make that two then. One method used makes use of garlic. Garlic placed outside of the home repels the rodents. Like many humans, they do not like the strong smell of garlic. And as an organic method, garlic poses no threat to the human household.
Garlic does not damage your natural environment either and, in fact, is good for it. Red hot chili or jalapeno peppers may be enjoyed by some, but definitely not by most. No-one likes their tongues burned to a cinder. So, just imagine what this would do to the small critters. Instead of preparing a fiery concoction, you can simply purchase a bottle of the hot stuff and splatter in those areas where the voles have been roaming about.
This is easy to detect because the rat-sized rodents tend to leave a lot of mess behind. The fiery heat of your red hot chili peppers and hot sauce reaches the creatures’ paws. It is quite painful to them, so stay up all night and see if you can watch them run a mile. Poisons work, but it would be a good idea to work with specialist pest controllers. They will have a battery of poisons that are most effective.
You also need to know that this method poses further harmful consequences in and around your property. Rodents will be dropping dead, not quite like flies, but they do not run away. They die on the spot and are left to rot. When using this method, with or without professional assistance, extreme caution is advised. Repellants are not quite poison. They are commercial products that work in similar vein to your abovementioned garlic.
It is all about using an obnoxious smell to drive away unwelcome visitors. The problem with this deterrent, however, is that while the smell is vile to the rodents, you and your fellow occupants will not be able to stand the smell either. Gravel is another natural alternative well worth a try. Voles love to dig, but by placing gravel in its way, they will be discouraged. They cannot maneuver their way around your property with the impediment of what to them would be rocks and boulders.