black scale

Question

My tree has a black scale of about 1/4 inch around. Quite a few branches affected and are about 4 inches long. How can I treat it? Thank you.

Answer 1

I'm not clear as to the type of tree that is affected.

Here are a couple of links for you.

https://www.gardeningknowhow.com/edible/fruits/citrus/controlling-citrus-scale.htm
https://www.gardeningknowhow.com/ornamental/trees/maple/maple-tree-bark-disease.htm