Hi, I this year is my first attempt at gardening and I planted two Boston pickling cucumber plants in my raised garden bed. They have been producing cucumbers starting last week (I planted the last week of may) but the leaves have been dying and I'm concerned that it may be something serious. I have attached photos showing the leaves when they 1st show signs of discoloration, then as they worsen and I remove them from the plant and the base of the plant.
I've read so many articles regarding cucumber issues and diseases but it seems like half of them to me. Any clarity will be greatly appreciated

!