Moles are rodents that have a strong ability to tunnel through the earth. They create tunnel systems and then persistently seek out worms, grubs and other small organisms to feed on. They are generally not a serious threat to lawns, but they sometimes separate grass roots from the soil or create unattractive holes; thus, homeowners often wish to get rid of them.
Moles can cause damage to the lawn by separating the roots of the grass from the soil. Growing thicker grass will cause the grass to develop thicker root systems that extend deeper into the soil. These thicker root systems are difficult to tunnel through, so moles will be less willing to construct tunnels underneath, according to the Little Green Apple,
The process of the mole digging through the soil can benefit the soil by aerating it, which makes it easier for the plants to absorb nutrients through the soil. The moles also turn the soil, which allows nutrients to get distributed more broadly.
A variety of traps are available for mole removal. These traps must be placed on top of the main mole tunnel, which is usually a tunnel that runs alongside a wooded area. The mole is then taken into the wild and released. A more manual alternative is to try to dig up the mole using a shovel.
Moles create holes in the lawns. A mole-ridden lawn might also have damage as a result of grubs, since moles often go into lawns to feast on grubs. Killing off the grubs will not only eliminate the damage caused by the grubs, but will also cause moles to travel elsewhere in search of grubs, according to the Little Green Apple. Grub treatment includes insecticides and milky spore disease, which is a microorganism that infects grubs and kills them. However, if the mole is not causing extensive damage to the lawn, some homeowners simply allow the moles to eventually kill the grubs themselves.
Trapping moles is not always effective because the tunnel system that was created by the mole will often be recolonized by new moles. Moles tend not to construct new tunnels unless they are forced to do so in order to find food. Overwatering a lawn can cause earthworms and other organisms to move towards the surface, forcing the moles to also dig closer to the surface. If the lawn is not overwatered, the mole tunnels may be so far beneath the surface that they do not affect the lawn. Moles can also be driven away from a lawn by using mole repellent.