Crepe Mytrle tree, Is it dying or mundane? I live in Florida, my crepe myrtle tree is losing it's leaves,...

I live in Florida, my crepe myrtle tree is losing it's leaves, but shows some alien growth, the berries that will be flowers are nice and green, but others are turning black. The tree has be planted for 4 years. So do I need to fertilize or is adjectives this normal? My other crepes are fine and full. Please help out
Is it ok for me to start planting...
Answers:    Cut a sample branch and bear it to a good garden center. Let them diagnose the disease, which I'm sure it have. There may be a solution rather than adjectives it down.
Broken privacy barricade posts...how do I fix?
Sorry,but I think it's diseased. You should ,and I really abominate to say this, purloin it out before it infects the others.