Slug puree won't work - quite the reverse, in fact. If you kill a slug or snail in the evening, then go back an hour or so later, their friends and relations are all gathered round them. Weeping into their hankies, delivering eulogies and singing 'Abide With Me'? No, they are eating the deceased.
Organic methods here on the Merlot estate include a good torch and: scissors (cut them near their heads or the rest tries to carry on regardless); boots (not wellies or trainers because they get into the grooves on the soles and are not squashed properly); old cottage cheese tubs full of salt, with lids for disposal in the bin (put slugs in and shake).
I do think The Big Foot stamping down from the sky or a snip with shears is much more humane than drowning or frizzling to a pile of green snot in salt. Slug pubs - now they are disgusting...what do you do with the resultant fermenting dead slug sludge?
Catching them and putting them somewhere else won't work....haven't you heard of homing slugs?
No, it's the Killing Fields out there at Merlot Acres.