My crepe myrtle trunk and limbs are black. What's wrong and how do I fix it?
My Crepe Myrtle Trunk and Limbs Are Black, Whats Wrong and How Do I Fix It?
Certified GKH Gardening Expert
This is sooty mold. It happens when the plant gets a pest infestation. I would recommend using neem oil, as this will get rid of the sooty mold fungus and kill the pests. Here is some articles that will help you: