What's causing these two problems?
The first photo is of a leaf from one of my old, established roses. I don't know what kind it is (it came with the house.) What could be causing the drying of the leaves like this? The rose bush farther down on the same wall doesn't have that problem.
The second photo is from another my old, established rose in my back yard. Not all of the leaves are like this; just a particular patch up on top.
I'm in the Phoenix area where it's in the hundreds every day now.