A. Loquats are edible and considered quite good. The Cooperative Extension Office should have a loquat brochure available. Loquats get fireblight once in a while. The branch tips will die back. The best thing to do is prune out the dead wood.
Loquat is otherwise pretty pest free.
Q. I purchased a breadfruit tree in the Keys. A. Breadfruit is a very tender tropical tree that can be grown in Key West and the Lower Keys. It cannot endure any freezing temperatures, so will not survive on the Florida mainland. A. Jambolayan plum is a large growing tree with very strong wood. It produces fruit heavily, probably more than the average homeowner can use.