Does canker spread to other trees?
No. canker doesn't move tree to tree in a way that makes your other trees a worry. 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 check
Sunken dead patches on bark, sometimes oozing, often with cracked margins. Branches above the canker die back.
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?→
- Can a tree with canker be saved?→
- Is canker a problem in Indiana?→
- What does treatment for canker cost?→
- What trees does canker attack?→
- How do I know if my tree has emerald ash borer?→
- Can a tree with emerald ash borer be saved?→
- Is emerald ash borer a problem in Indiana?→