Disease ID

[dshreter]

I had what I thought was powdery mildew show up, with white fuzzy spots on the tomato foliage, it also showed up on my pumpkins and cucumbers. I treated that with potassium bicarbonate, which seemed like it was working, and left black spots all over the tomato foliage I assume where the powdery mildew was. The most healthy plants did not have spotting.

However, it did seem as though it continued to spread, so subsequently I also sprayed Natria Disease Control (similar to Serenade).

A number of my plants still seem to be failing though, and the presentation on the leaves seems to have a number of different appearances. For sure it is affecting lower leaves first. Some leaves appear a bit oily. I’m hoping for help based on these photos, and guidance if it’s time to discard the plants. It’s confusing because it looks like a few different fungal diseases.