One of the joys of my job is when I am taught something by my clients. That happens quite often!
This client gave me a tip on how to prevent slug damage to tender perennials particularly her hostas.
Beer I asked?
No, she uses a much cleaner technique by cutting off a small-needled branch of her old Christmas tree and placing around the base of the plant. Slugs do not like the scratchiness of the pine needle on their tender bellies.