Controlling Slugs

Controlling slugs

There are several things you can do to prevent or control a slug problem.  Since slugs like a dark, damp environment, anything you can do to create a light, dry environment will discourage them.  In areas where slugs are a problem, remove mulch and leaf litter near plants, space plants farther apart, and cultivate the soil frequently to keep it dry on the surface. 

There are several simple, yet effective traps you might try.  Slugs are attracted to and will drown in a shallow pan of stale beer sunken so the container lip is level with the soil surface.  You could also use overturned flower pots, grapefruit rinds or a board, raised about an inch above the surface of the ground.  Any of these items will provide a daytime hiding place for these pests.  Lift the trap and dispose of the slugs in a bucket of soapy water or sprinkle salt on them to kill them.  

Being soft-bodied creatures, slugs don't like anything sharp.  If they suffer a cut, they may dry up and die.  Sprinkle sharp sand, diatomaceous earth, or dried, crushed egg shells as barriers around your plants.  You will have to replace these materials after a heavy rain.  (A black slug is pictured.)

Slug baits are also available for poisoning slugs.  Although the most common slug control baits contain the slightly toxic chemical metaldehyde, new baits containing iron phosphate are less toxic to animals and humans.  Any bait will have to be reapplied after a rain, and you should be careful not to sprinkle baits where pets and young children can easily eat them.