[header] How to get rid of garden slugs [title] Use beer or milk traps for important plants. [step] Slugs will only notice these traps from a few feet (about a meter) away, so this is best used for small gardens or important areas. Set these up as follows : [substeps] Bury a tall cup with steep sides into the soil. 
Leave the rim ½ inch (1.25 cm) above the soil, to prevent the trap killing beetles that hunt slugs. Fill the cup halfway with beer or milk.