Dear Lucy,
Use rubbing alcohol on your slugs; just put it a spray
bottle, and give them a small squirt. It works every time.
Don't use salt, or else the Ph level in the soil will become too
high and kill your plants.
Best Regards,
James
Ohio Molluscan Studies
c/o James M. Cheshire
3185 Raccoon Valley Rd.
Granville, OH 43023-9472