City uses them on the curb along my rode - have one right outside my house and i’m trimming back the suckers on the roots several times a year....I’d cut it down but I’m not allowed to....
Poison works.
Pound a couple copper nails into the trunk.
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To kill a tree simply cur a inch deep continuous circle around the trunk. It will die. Then the county will have to cut it down.............
Girdle the trunk.
Injecting some glyphosate into the trunk can work, too.
See the link at post 8.
Less obvious than girdling it, which might get you into trouble as it’s likely to be noticed when they go to cut it down.
Pssst. You didn’t hear it from me, but all you need is a sharp knife and you can ‘ring’ the tree trunk. That stops nutrients from moving up and down the trunk via the bark. If there’s a gap in the bark all the way around it, it will die.
Again, you didn’t hear it from me!
We have a ton of Poplars in our woods. No one planted them, and they’re quite pretty - they look very much like White Birch and look nice in among the various evergreens.
The ‘Boulevard’ trees I can’t stand are those Japanese Lilac Trees. They look gorgeous for about 15 minutes in the spring when they bloom, and then they are butt-ugly the rest of the year.