The white stuff is what concerns me. It may be spider mites. Take a look at the white on the leaves with a strong magnifying glass. Tiny and hard to see by eye. If you have spider mites you will see them crawling around...

I have not seen any spider for months, maybe it can be the fungicide that I am applying (daconil). The leaves were damaged after these mites, and I have spent work to combat them, every week I check the plants with a powerful magnifying glass, so I think it may be the fungicide.

The newest leaves look really healthy, and even the older ones just look like they have a bit of residual damage. Hopefully the battle is over!