Moles can be a big problem in a lawn. They can seem to appear overnight as soon as spring thaws the soil. The average square yard of lawn is usually only infested with one or two moles. But each of these pests can dig up to 100 feet of tunnels per day. Luckily, new advancements in mole bait have made poisoning moles the easiest and least expensive way to rid your lawn of moles for good.
Wait until the spring or the fall to rid your lawn of moles. This is when moles are most active near the surface and the most accessible.
Find a tunnel that the moles use repeatedly. Likely tunnels are those that run in a relatively straight line or along a structure like a curb, driveway or gutter. To test a tunnel for frequent activity, puncture the top of the tunnel with your finger or a stick. Then mark the puncture and visit it once a day over the next 3 days. If the puncture has been filled in within that time, then this tunnel is frequently used and a good site for the mole bait.
Bait the mole tunnel. Look for a bait like Talpirid which looks and smells just like an earthworm and contains a lethal dose of bromethalin. Use a stick to poke a hole through the top of the tunnel that is large enough to accommodate the bait and then drop it in. Then watch the hole for signs of activity that suggest that the mole has taken the highly-attractive bait. Once ingested, mole bait containing bromethalin can kill in 24 hours.