Any advice? My new yard has some beautiful plants that were neglected
by the former owner. The dogwood is about 40 feet tall and the upper
third looks pretty healthy. The lower branches and leaves are quite
damaged by the disease although the trunk looks fine.

I've read about prevention (which I wish had been exercised here) and
control, but I'm not sure if it's a lost cause. Anyone have
experience combatting this disease? Should I spend a few years trying
to revive this tree or should I begin thinking about what to put in
its place?

Many thanks,
Samantha