I think my pumpkin plant is sick and I'm not sure what I need to do to heal it. Can someone please help me figure out what the problem is? Thank you.
It looks like "Downy Mildew." Get aggressive with it and spray an antifungal that is labeled to treat "Downy Mildew" or it will kill your plant. Good luck!
Looks more like mechanical damage to me.
If it's downy mildew, should have fine fuzzy stuff on the underside of the leaf.