Region is Pacific Northwest (Portland)
We have a 12 ft tall Nyssa Sylvatica that's showing significant brown leaf spotting that is worse the higher you go. Photos are below.
Last year, while still only about 7 ft tall, its leaves turned a brilliant red in the fall without exhibiting any spotting.
Question: Is this a disease, and if so what is it and what is needed to treat it?
Top 1/4 of tree
Top 1/4 closer detail
Treetop
Mid-level branch (less discoloration)
Lower branch (almost no discoloration)
