I have just noticed ugly growths on the bark of one of my old crepe myrtle trees. It was obviously not part of the bark, so I shoved my trowel between the bark and the growth. When I did so, several small, black ant-looking critters came out. The same type of growth is on several other areas of this one tree. Can you tell me what it is?
Ugly Growth on Crepe Myrtle Tree
I would take a sample of the growth and the insect to your local agricultural extension office for identification. It probably is an ant, but there are "ant mimics". With a positive ID on the growth and the insect, they can reccomend treatment.