Ohia trees are dying rapidly, Why?

[pbmaise]

There was a valid question that should be addressed better. What are the best trees for homeowners to plant? What is the best compromise between being:
#1 Native versus already present
#2 Non-invasive versus fast growing
#3 Soil sustaining and nitrogen fixing?
#4 Support animals - like birds, but not pigs.

I collected a seedling from the old fire station parking lot in Pahoa from a monkey pod tree. I know it is African, however, wanted a tree that would cover a large amount of sky from a single trunk. It has grown very well in Puna Beach Palisades despite being in mostly rocky poor soil.

Note: What about this statement "He suggests that it’s even possible that Ceratocytis spores may land on plants growing near #699;#333;hi#699;a and movement of those plants may spread the disease." I think orchids are already being sprayed. Or are they?
http://mauiinvasive.org/2015/05/19/rapid-ohia-death/

Someone suggested fighting fungus with fungicide. Some plants kill fungus and apparently protect themselves. The leaves of one plant are harvested in the Philippines to make a natural fungicide. This plant is invasive and already in Hawaii. Perhaps if this plant grew under existing ohia, the leaf litter filled with fungicide would protect the ohia too.

Maybe there is a local plant that also provides these properties.

See:
http://www.stuartxchange.com/Akapulko.html
http://www.hear.org/pier/species/senna_alata.htm
https://en.wikipedia.org/wiki/Senna_alata


The plant already in Hawaii that I would consider