I think ground egg shells are good for getting rid of them. Take some empty egg shells & toast them in the oven on low heat; then grind them up & sprinkle around where you see them.
from motherearthnews:I rinse out the shells, let them dry and store them in a coffee can. After the can is full, I put them in an old food processor and grind them up. I sprinkle them around my flowers, veggies, etc. Slugs will not crawl across them. Also, the eggshells provide the mineral benefit of calcium for my garden!
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http://www.motherearthnews.com/Organ...#ixzz1P1n3mchu