Take 2 full bulbs of garlic cut in half and add to 2 litres of water in a saucepan.

Boil until soft and squishy and use a potato masher to extract as much of the garlic as possible. (Your kitchen will be a bit smelly, if you like garlic fine, if not suggest you open all your windows!!)

 Sieve out all the skins leaving a cloudy liquid, which will become your concentrate. Keep in an empty screw top bottle.

Dilute  approx I part concentrate to 10 parts water, best in a garden sprayer.

Spray your Hostas once a week.

Remember you may need to apply more regularly during wet weather.