What I learned today; ammonia fertilizes hosta
In addition to killing slugs, ammonia is broken down by bacteria and fungi into nitrogen and nitrites then into nitrates (the same fertilizer found in fish tank water) which fertilize plants. So when you spray a 10% solution of ammonia you will kill slugs (I don't have many, but I must have some) and the ammonia will be broken down into fertilizer for the hosta and other plants. Interesting.
I will be going out tomorrow and buying some ammonia and kill some slugs and fertilize the garden (dead slugs must be good fertilizer as well). Two birds with one stone. Hard to beat that.