All I know is that it's being studied here in VT,
where us laypersons spot these things that look like triangular/boxy purple windsocks
in trees, and articles in the paper say it's because of that invasive insect.
But I don't know the extent of it, just that there's some awareness in local scientific community.
I wouldn't recognize an ash tree from any other unidentified tree.
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*"I don't know what it is, but I know what it isn't."*