I understand they're great for the soil, but they're ruining my front yard. They leave casings all over which buries the grass blades. I tried Dursban on the advice of a local nursery but to no avail. Your lawn is probably home to night crawlers, a large earthworm that rises to the soil surface at night and leaves relatively large deposits of soil, says UC master gardener Bill Pierce. This specie of worm is highly prized by fishermen.
Many homeowners also prize it since it aerates the soil, which leads to improved water penetration.
If you went out after dark with a flashlight, you could gather them. This may sound far-fetched but many people rid their gardens of snails this way instead of using poisons. Raking or sweeping the turf is effective in spreading around the casings. Dursban is no longer recommended for use on lawns. It has been overused and applied incorrectly in our communities and is showing up in our creeks and rivers.