Japanese Maple Bark
I noticed insects on a few branches of this tree within the last 6 months. Treated with insecticidal soap and forgot about it. Notice now that the bark looks thick. Does this look diseased? If yes, is there a treatment? Thank you for your assistance!
The bark of your tree looks fine and does not look diseased.
It's important to know that the vast majority of insects are not pests at all and many are very helpful beneficials who either pollinate, help to control those that are pests, and/or are food for birds, wildlife and other insects, and should be conserved.
If you can get a photo of the insects you are concerned about we are happy to take a look any time, and let you know if we'd recommend controlling it.
You can see some at this page from our website: https://www.extension.umd.edu/hgic/topics/insects-spiders