If you want to kill snails, you can do so with salt. Salt, for example, absorbs water from mollusks, which dehydrates and kills them. Sprinkle the salt directly onto the snails or use a thick layer of it to create a barrier. Be aware, though, that salt can harm plants and other animals.

Do snails feel pain from salt?

“Slugs and snails are extremely dependent on a high water content in their bodies. They constantly need water to replenish any the lose. “We don't know how much pain they feel when in contact with salt, but a slug or snail caught in granules will try to wiggle away while exuding a lot of mucus to clean their skin.”

Is it cruel to put salt on snails?

Some gardeners use salt to create barriers for slugs and snails, which is even worse. In most areas, applying salt in the garden is forbidden because not only does it ruin the soil and damage the slugs, but it also kills all living beings that come into contact with it, even plants.