Naturally occurring microscopic nematodes which seek out and kill slugs. Easily mixed with water and applied with a watering can, giving protection for up to six weeks. Apply when slugs are active, and ensure the soil is moist for optimum performance. For best results the soil temperature needs to be 5 degrees and above.
It kills mainly young and small slugs under the soil surface (90% of the population), rather than big slugs on the surface, for which additional controls may be needed. However, it does mean that the young slugs do not mature and breed, giving a much reduced slug population in the future.