Noticed these a few days ago on a few of my leaves, but wasn't sure entirely what they were. It hasn't seemed to progress much, nor has it spread to the other leaves on the plant, but I don't know for sure what it actually is.
My first though, considering they're pumpkin leaves was this, but I think it's too early to tell right now.
https://www.almanac.com/pest/anthracnoseI'm pretty sure it's not powdery mildew since that's bluer in color.
Does anybody more experienced in this than I have an answer? Does it look familiar? What action should I take, if any?
