Read and follow all label directions and restrictions. Zinc phospide is a restricted use pesticide. Bury the bottom edge six to ten inches to prevent pine voles from digging beneath the barrier. Mouse traps, or snap-back traps, can be very effective in reducing the vole population. Place the trap perpendicular to the runway with the trigger end in the runway.
Apple slices or a peanut butter-oatmeal mixture make good baits.
A section of roofing shingle placed over the burrow opening and baited with an apple slice will attract voles. A trap can also be placed under this shingle, as voles are readily attracted to shingles or pieces of plywood placed on the ground. Shingles should be bent to form an A-shaped root. Plywood or flat material should have small blocks under the corners to allow for a crawl space. These shelters can also serve as bait sites.