Leicestershire, United Kingdom

I am growing brussel sprouts, black Kale and broccili for the first time. They all appear to have developed these bright white patches on their leaves. It is not mould. It does not wash off nor can it be wiped off. It is as if the colour has been bleached out of the leaf in patches and each patch appears to grow like a leaf minor attack. I have grown many flowers before but never seen anything like this. Any ideas

• 5 Jul, 2010