Beer Trap

A beer trap consists of a plastic bottle or tub filled with beer placed in a snail-rich spot.

Beer trap – a plastic bottle or tub filled with beer is placed in a snail-rich spot.
Fill a plastic bucket like for wall paint from DIY store and fill it with beer. Fermenting beer attracts snails (including the slug). Only fill the bucket with a small layer of beer: too much beer will drown the snails. Effective, but less friendly. With a little beer, the snails hang drunk in the bucket and can easily be moved to places where they can do no damage. You don’t have to make a beer trap yourself; ready-made beer traps are commercially available.
The disadvantage of the beer trap is that several have to be placed in the garden to be really effective.

Snails, photo: CC0 Public Domain