The copper spary will probably keep it under control especially if you have trimmed all the sick looking stuff off. Sometimes it takes several treatments to slow or stop many of those speck and spot diseases. They are very persistent in my experience. I had a bad one on my bell peppers one year and it took a couple of months before it stopped showing up on the leaves and peppers. I think the best offense with those type diseases is a good defense. By that I mean keep regularly using fungicides that help prevent them. Of course rainy weather can throw that strategy out the window sometimes.
Bill
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