Well, this thread certainly has attracted of lot of slimy slugs by the way of spammers.
I am overrun with Spanish slugs. Apparently they are bitter to taste ( I decided not to test that) and are not eaten by all the usual predators, like frogs, birds etc.
Only the baby ones are attacked by nematodes, and adult ones can consume 20+ pellets without effect.
I find that beer traps do work (I brew up a diy brew in a bucket), but each trap only gets 3/4 a night, atm I have 10 traps. Some gardeners are reporting 4000 slugs/month.
I also go round most mornings with a brick and lift anything where they hide. ATM I humanely squish 50 ish each morning.
Good news this morning - they are forecasting El Niño so we are likely to have a hard winter that will kill off many of them.