As the nematodes invade the slug, it will stop feeding and burrow underground to die. ... Nemaslug also kills slugs above and below the ground. To apply, mix the powder with water and apply to the soil around the plant using a watering can fitted with a rose. Apply in a broad band around plants.

Does Nemasys work on slugs?

Nematodes are capable of surviving the odd frost, so don't worry if the temperature falls after you have applied Nemaslug. Metaldehyde based slug pellets are reported not to be effective below 7ºC. Unlike some controls, Nemaslug continues to work well during wet weather – exactly when you need protection against slugs!

Which nematodes eat slugs?

Biological control: Nematodes There is a microscopic nematode Phasmarhabditis hermaphrodita which kills slugs - particularly small, soil-dwelling ones - but not snails. It is a native species and can be found naturally in the soil throughout the UK.