May 18, 2015 - 10:46 AM
Controlling the population can be quite different. Using a slow acting bait such as Ramik or Kaput or any mouse bait containing Diphacinone can work. Bait has to be placed at each point where there is a burrow, tunnel or trail. This could mean using a lot of bait.
Here is a link to a good article on Vole control by the University of California. Hope this helps.