Hi, Kelli,

I’m so sorry to hear about your dad, and I hope you can figure out how to manage his peaches so that they can comfort you in his memory.

I’m not an experienced Kansan peach orchardist, so im just hoping to offer a few resources and maybe attract a few more eyes to your post.

Can you add pictures of the trees and the site, and the black spots last summer if you took any?

How old are the trees and do you know the varieties?

It looks like your Kansas State county extension services have a lot of good peach growing info.

This pdf has a spray schedule for peaches on page 8:

https://www.sedgwick.k-state.edu/gardening-lawn-care/fruits-vegetables-nuts/Fruit_Pest_Control_for_Home_Gardens_C592.pdf

And this tool (search for ‘Peach’ at the top) may help you identify the problem(s) you see as they come up.

https://hnr.k-state.edu/extension/horticulture-resource-center/common-pest-problems/produce.html

My condolences,

~emmers