Well, you guys got me a bit confused now.....I live in the desert....the tree gets watered every other day, and my soil is very sandy, so drainage is not a problem....yes low humidity, too, generally.
I just changed the watering situation from sprinklers, that were hitting into the canopy of the tree, to bubblers on the soil level. I was planning on scraping off the diseased bark and "painting" onto the damaged, but now cleaned part of the trunk, with some copper fungicide, mixed with later paint. Do you guys think that will work for my situation?
Thanks....MangoFang