This is for slug control. I mix sudsy ammonia with water, half and half (they really won't crawl away from this mixture!), or a little more water and put it in a spray bottle. You can spray this solution right onto the flowers and plants and it doesn't hurt them. That way you get all the baby slugs that the mother has lovingly placed to feed on the tender parts. It works great. Happy slugging!
9/25/11 - I read about using ammonia and water spray for slugs yesterday, so decided to give it a try. The slugs are worse this year than ever before. I sprayed a very large slug with 6 parts water to 1 part ammonia. It immediately started to disintegrate. I went out a few minutes later, and it was completely gone.
I had used a bucket of water, ammonia and dish detergent to drown them in and that worked too. But I like the spray better and it works so quickly. I had planted several little mum plants last weekend and the slugs defoliated one of them in one night, blooms and all! The spray didn't seem to hurt my plants at all, so I think the 6-1 ratio is safe for any plants. I've been gardening for over 15 years, and this is the best solution I've found for slugs.