Or if they eat enough of it, it is a stomach poison. The next morning, the South Africans noticed an accumulation of paralyzed and dead slugs and snails around the fuel. Word spread quickly via gardening publications, and by the late 1930s metaldehyde was widely used in slug baits, especially in formulation with wheat bran, which slugs love. Metaldehyde is sold in combination with carbaryl, a poison effective in controlling pests called sowbugs. Place scrap boards on the soil under plants and between garden rows.
Slugs love yeasty odors.
Take a coffee can or plastic yogurt container with a plastic snap-on lid. Cut a hole in the side about halfway from the bottom. Bury the can to the level of the hole. Pour about two inches of beer or yeasty water in the can or container. Cover to reduce evaporation and to keep out pets.