Posted: 10/02/2012 at 23:30
I watched a programme where a couple boiled a head of crushed garlic in a litre of water until it had reduced by at least half. Let it cool, sieve it, bottle it and keep the concentrate in the fridge. Use two cap fulls in 5 litres of water and spray onto your plants, all the way to the base. You can burn the plants if you use too much but this did work.