At the beginning of July I wrote about my concerns with several days of very mild and damp weather that favours the growth of fungi. My main worry was rust fungus on our garlic, onions and leeks. Did this mean we should expect a bad season for the fungus powdery mildew on our newly planted courgette plants? Powdery mildew on the leaves of courgettes is a perennial problem and I have not yet managed to tie down the years when it’s likely to be worse, or find a prevention. As fungi like damp conditions, then I think with the mild weather we are having, a warning sign should be put up “Beware of Fungi”. Anyway this year I set up an experiment to see if powdery mildew could be controlled and I’m reporting what happened in this blog post.