Help - White Leaf

[user10]

Hi all, I am having great difficulty with my tomato leaves. This is happening not only to me, yet several people in my street.

To start off, the leaves are thinning out, with a curve facing down words. If you flip the leaves over, you can see a white dot. The white dot spreads till the leaves fall off. Do to that, the stems are not growing in it’s regular speed.

We are all puzzled.
We all have different tomato plants, soil, fertilizer,…….everything different.
I would think that the only cause can be the weather. It rained quite a bit for weeks, could it be bad drainage ?? or simply dampness ??
This has never happened before.

Any help would be appreciated
Thx