Soft-bodied mollusks (snails have shells, slugs don't) that chew irregular holes in foliage, prefer moist conditions, and are most active at night or in wet weather.
In plain terms
Slugs and snails are common garden pests that eat irregular holes in leaves and vegetables. They're most active at night and in wet conditions. They hide under mulch, rocks, and debris during the day. They're attracted to decaying plant material and prefer moist soil. Control includes hand-picking, beer traps, copper barriers, and reducing moisture and hiding spots.
Why this matters
Slugs and snails can decimate seedlings and salad crops. Early detection and environmental control prevent problems.
In practice
Examples
Seedlings decimated overnight by slugs; hand-pick at night with flashlight; use beer traps.
Lettuce with irregular holes; slug damage visible; increase spacing, reduce mulch near plants.