When should I treat for canker?
Prune out affected branches in dry weather, well below the canker.
Why timing decides it
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.
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
- How do I know if my tree has canker?→
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- Is canker a problem in Indiana?→
- What does treatment for canker cost?→
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