Yesterday I moved cucumbers into the garden, they looked healthy with a few sun damaged leaves, but otherwise healthy and spot free. I sprayed an organic pesticide/fungicide for the first time in the garden yesterday at evening as well. We unexpectedly got a late frost so I covered all of my frost sensitive plants. Came out this morning and uncovered them, and discovered spots on my leaves of several cucumber plants. The spots do not rub off. Not sure how to post multiple pics in a post, so there may be one or two more pics below. Anybody know what this is? How do I treat it? Thank you for your time!