mildew.... or maybe not...

I went into my greenhouse last night to find that two of the courgettes along one edge appeared to have mildew on the leaves, so came on here to look for solutions, and read about the milk spray!

So, found a clean sprayer, made up a solution and went back out to spray them this morning. But before doing so, I decided to give the leaves a wipe... and it turns out the mildew was in fact the dust from drilling into the wall above the plants to fix a hanging basket hook!! 

  (sorry for laughing  ) 

At least it isn't mildew!