What does treatment for canker cost?
There isn't a treatment worth paying for. A canker that has girdled more than about half the trunk circumference is structural, not cosmetic. Small branch cankers can be pruned out; trunk cankers usually can't.
What to spend money on instead
Prune out affected branches in dry weather, well below the canker.
Indiana specifics
Common on stressed honey locust and on trees with mower or string-trimmer damage at the base — which is a genuinely avoidable cause.
Related
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