Good news: just look how huge my chard is now!

Bad news:
So, is this powdery mildew on the flat-leaf kale and the dill? If so, what should I do about it? The internet says to pick off the affected leaves, but that's most of the leaves and I'm afraid that would kill the entire plant.



From:
no subject
From:
no subject
Where I am (damper, less hot, lots of powdery mildew), I can say that not evicting the early signs of mildew (there's no point for my locale) means that the plant starts dying anyway. Plucking leaves in case the plant can make new leaves with adequate/appropriate provision of water seems sensible, IMO.