Home-made garlic spray can be used to deter slugs to keep hostas looking good. The recipe is very simple:
1 Bulb Garlic
1 Litre of water
Crush the garlic bulb, add to the water and boil for 5 minutes.
Cool, strain and store in the fridge.
To use: dilute 1 tbsp of the garlic solution per litre and spray the plants and surrounding soil.