Check and remove slugs daily and refill with solution. Copper barrier strips or screens are showing some promise as effective slug barriers. These materials are sold at lawn and garden stores. Take care not to trap slugs inside your garden plot. Raccoons, opossums, snakes, mallard ducks, bantam chickens and some ground feeding wild birds feed on slugs.
Mulches usually provide natural places for slugs to hide.
Remove mowed or cut weeds, grass and spent perennials to help reduce slug refuges. Dedicated slug slayers stalk their quarry by night with a head lamp or flashlight. Do not put salt on slugs, as adding salt to the soil makes it unsuitable for gardening. Not the least toxic, but the easiest and most reliable method of slug control is placing poison slug bait around the garden, said DeAngelis. Metaldehyde is the most common active ingredient.