By Annegerman
South Yorkshire,
United Kingdom 
My courgettes developed mildew on their leaves some weeks ago now - this has continued to spread at a slow pace although the plants are still producing a good crop of courgettes. How can I prevent this?
Have been really appreciative of previous answers to questions.
Annie
8 Sep, 2011
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Try the milk solution - organic and good on edible crops. Mix one part milk to nine parts water in a sprayer, and spray. Been tested scientifically, they say it works. Some suggestion that higher fat milks work better, not sure about that - I'd imagine semi skimmed would be fine, perhaps not skimmed.
8 Sep, 2011