Answered for Brownsburg, Hendricks County.
Common on stressed honey locust and on trees with mower or string-trimmer damage at the base — which is a genuinely avoidable cause. In Brownsburg, no published species-level street tree inventory exists for Brownsburg, so exact species counts are UNVERIFIED; what is documented is that the town replants under an approved street-tree list in Town Code Sec. 96.20, so the street canopy skews young and town-selected rather than volunteer-grown. The one region-wide certainty is that ash is effectively gone from the mix after emerald ash borer moved through Indiana. A canker that has girdled more than about half the trunk circumference is structural, not cosmetic.
No published species-level street tree inventory exists for Brownsburg, so exact species counts are UNVERIFIED; what is documented is that the town replants under an approved street-tree list in Town Code Sec. 96.20, so the street canopy skews young and town-selected rather than volunteer-grown. The one region-wide certainty is that ash is effectively gone from the mix after emerald ash borer moved through Indiana.
Sunken dead patches on bark, sometimes oozing, often with cracked margins. Branches above the canker die back.
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.
Prune out affected branches in dry weather, well below the canker.
8446 N State Rd 267, Brownsburg, IN 46112
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6565 Coffman Rd Bldg D, Indianapolis, IN 46268
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Distance measured from Brownsburg.