Trees, Shrubs and Conifers: Zelkova Bark problems, 3 by 1alh1

1alh1 wrote:
I\'ve removed quite a bit of bark that was loose and sprayed the trunk with imidacloprid. I didn\'t see any borer holes, but there were quite a few pill bugs and earwigs under the loose bark. I\'m attaching photos to show the trunk from various directions. Photo #1 faces northeast; Photo #2 faces west; Photo #3 faces southwest; Photo #4 faces west; and Photo #5 faces east. Can anyone tell from the photos if I should remove more bark? Or should I cover the exposed areas with trunk wrap? We\'re still experiencing high temperatures (85-90) with bright sunlight. We still haven\'t had much rain, but I\'m using a soaker hose to provide additional water. In an earlier message (Viburnum Valley), it was mentioned that the damage appeared to be self-inflicted. What does that mean?