Using cardboard on the garden ground has attracted the slugs that have become overwhelming in my garden, loving to eat my vegetables. They go under, and in the mornings and evenings, I can turn over the cardboard and pick out large numbers of slugs. Sometimes leaving them for a few days, attracts even more. Works better than a container of beer, as it doesn't cost anything, and collects larger numbers of the slugs. And sometimes snails, but the slugs like the cardboard better than the snails.
Using cardboard on the garden ground has attracted the slugs that have become overwhelming in my garden, loving to eat my vegetables. They go under, and in the mornings and evenings, I can turn over the cardboard and pick out large numbers of slugs. Sometimes leaving them for a few days, attracts even more. Works better than a container of beer, as it doesn't cost anything, and collects larger numbers of the slugs. And sometimes snails, but the slugs like the cardboard better than the snails.