What’s going on with my Pagoda Dogwood? On many branches, the top looks normal but the bottom seems to have been attacked by some critter. After last night’s talk, my first thought is bees, but our speaker didn’t mention any bees using live branches for nests. There seem to be little pockets along the bottom side of the stem with tufts sticking out. Some stems have a narrow line along them. Always the outer-most portions.
Here are some images – click the thumbnails for a larger version.
It’s over a large part, but not all of the tree. Some smaller branches are yellowed and appear dead. Can anyone help me out?