posted 8 years ago
In my area autumn olive tend to have lots of turkey tail as you mentioned as well as some variety of white toothed fungus (doesn't look like an edible variety to me. They also get a kind of white, fuzzy, cottony fungus that almost remind me of giant colonies of mealy bugs.
I don't think the wood holds together long enough for the slower growing, edible fungus that many of us like to grow to fully mature.
I've noticed that when I cut a branch at any height, it pretty much dies back to the crown and quickly becomes inoculated with the above mentioned fungi. The crown will sprout new growth in the spring and all will be well with the shrub. Autumn olive breaks down very fast so far as I can tell. It's not uncommon for a large branch to take only a couple years to fully decay. After one season, the wood gets super spongy, which is one of the reasons that I like it for building hugelculture stuff. I think that's it's role in nature... get in, get out, leave nothing behind but better soil for the hardwood trees to grow in. I really like autumn olive and use it for many things around the property. If you find a good fungus variety for them please be sure to let me know.