I thought all our boxwoods had leaf miners, but I'm afraid I found a new disease today. These boxwoods were purchased from a different place from all the rest. Can you identify the problem from the photos attached? Thank you, as always, for your expert help!
Oakland County Michigan
This looks like boxwood leafminer insects. Carefully peel the top layer back from the bottom layer of a leaf and look for tiny larvae inside. Some of your pictures show that insects have already left that leaf-, you will see small openings or missing parts of leaves. It is a common pest found all,over Michigan.
Here is an article with description, pictures, and control options. The article also lists which varieties of boxwood are more resistant to this pest.
I am including a boxwood blight article to keep on hand so you can monitor your plants. Note the pictures of the leaves as well as stems: