Kill With Poison Safely
Kill by Digging Moles
Because moles may be active at any time, it is often possible during daylight hours to see the soil ridging up as the moles move along. If you have the patience, you can dig the moles out as they work their way across your yard. Quickly sink a spade or shovel into the soil right behind the active mole, and flip him out into a bucket for disposal. Be careful to wear gloves when handling the mole, which will not hesitate to bite.
Kill by Flooding Moles
The tunnel system created by moles is a maze of laterals and connectors and one or more resting or nesting chambers, and may riddle an area of ½ an acre or more. Its complexity protects moles from freezing or drought conditions, or flooding from heavy rains. However, because the nest chamber is most vulnerable when the moles have given birth, it is possible to flood them out and kill the young if you do it in spring.
This method works best with less extensive tunnel systems. Open an active tunnel and run the garden hose into the hole. Turn on the water and watch for the moles to surface and dispatch them accordingly. Depending on the extent of tunneling and the soil type (clay or sand), it will take 10 or 15 minutes to an hour before there is sufficient water in the tunnels to drown the young and flush out the adult moles.
Kill the Mole With Fumigation
The air in mole tunnels is low in oxygen and high in carbon dioxide. Moles are adapted to this, having much more oxygen-transporting hemoglobin in their blood than mammals that live in the open air. As a result, moles are more easily poisoned or suffocated by hemoglobin-destroying carbon monoxide and other gases given off by gasoline engines.
Fumigate moles right where they live with your riding lawn mower or car. Attach a flexible metal pipe to a gas engine exhaust and insert the other end in an active tunnel. Place a few drops of oil in the end of the exhaust pipe before adding the flexible pipe. The oil generates smoke which will escape from, and thus, reveal, any other openings in the tunnel system. Close these holes immediately with soil.
Pack soil around the other end of the pipe to make the connection airtight. Run the engine for awhile. The mole will die in the tunnel or struggle to the surface where you can dispatch it. Commercial gas cartridges or “bombs” are also available. Some of these are toxic, some are not. Read the package labels carefully. Never fumigate soil in areas that lie close to occupied buildings, as the poisonous gases may seep into the basement or crawl space.
Encourage the Predators of the Mole
We have found that a pet cat, allowed to be outdoors during the day, will often capture moles. Apparently the mole doesn’t taste very good, so our cats have almost always delivered the dead critter at our feet to show hunting prowess along with a superior gastronomic discrimination; preferring their cat food dish. This technique is only superficial. You must get to the cause of having a mole problem to make a final difference.