Been seeing these brown spots show up on my Apache blackberries. Didn't pay much attention to them at first, but their starting to take out all of my leafs, and it looks like it might be spreading. I've tried looking up the diseases for blackberries, but I just can't match it to anything. Not use to that kind of research I guess.

Any ideas on what this is, what caused it, and how to fix it?

Thanks in advance,
Richard

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