2. Manage habitat to discourage voles.
Keep all vegetation away from the base of trees. Keep
grass no longer than 3 to 4 inches. You may have to
remove mulch from gardens and around trees if the vole
problem is extensive. Keep the ground bare—voles do not
like to feed out in the open. Till the soil to destroy
runways and paths. Wire 3/8-inch hardware cloth
fashioned into cylinders 18 inches high will protect
trees when set 6 inches into the soil.
Habitat Modification
One way to effectively deter vole populations is to make the
habitat less suitable to them. Weeds, heavy mulch, and dense
vegetative cover encourage voles by providing food and
protection from predators and environmental stresses. If you
remove this protection, their numbers will decline.
You can reduce the area from which voles can invade gardens
or landscaped areas by regularly mowing, spraying with
herbicides, grazing, or tilling grassy areas along ditch
banks, right-of-ways, or field edges adjacent to gardens. If
feasible, weed-free strips can serve as buffers around areas
requiring protection. The wider the cleared strip, the less
apt voles will be to cross and become established in
gardens. A minimum width of 15 feet is recommended, but even
that can be ineffective when vole numbers are high. A
4-foot-diameter circle around the base of young trees or
vines that is free of vegetation or a buffer strip 4 feet or
more along a row of trees can reduce problems, because voles
prefer not to feed in the open. |