dutch elm disease

In 2022 I saw more trees die from Oak Wilt and Dutch Elm Disease than I ever have before. I don't think I've ever cried more over trees than I did last year either. Here are the some of the pictures from those sites. This was an aggressively managed site - late December to Early January...

I have several (presumably root-grafted) elms within a hundred foot diameter, a few of which are showing concerning signs (e.g., leaves flagging in summer, branches apparently dying off). Someone who I think knows trees suggested it's DED based on markings in this image at 4-5 o'clock, 7-8...

I am being sued for death of a 50years old American Elm that I pruned two years back. Tree has been removed and stumped by the treeowner. I was hired by a client to prune branches of an Elm that was situated on neighbour's yard. The tree owner (neighbour) is asking my client for cost of...

I just had an arborist come and visit and he recommended that we get Dutch Elm Disease Inoculation once every two years for this tree in the front of my home (pics attached). That's fine, but he's asking for $1075. That just seems steep, or is that the going rate??