Answered for Avon, 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 Avon, overwhelmingly young, nursery-planted stock: only 3.4% of Avon's housing predates 1960, so the typical "big tree" here is a 20-to-30-year-old subdivision planting rather than a legacy shade tree, with exceptions in the White Lick Creek bottomland and the fencerow remnants left when farm fields were platted. Ash is gone, and Avon's street tree ordinance actively steers right-of-way planting toward tall shade-producing species, reserving ornamentals for spots where space genuinely prevents a large tree. A canker that has girdled more than about half the trunk circumference is structural, not cosmetic.
Overwhelmingly young, nursery-planted stock: only 3.4% of Avon's housing predates 1960, so the typical "big tree" here is a 20-to-30-year-old subdivision planting rather than a legacy shade tree, with exceptions in the White Lick Creek bottomland and the fencerow remnants left when farm fields were platted. Ash is gone, and Avon's street tree ordinance actively steers right-of-way planting toward tall shade-producing species, reserving ornamentals for spots where space genuinely prevents a large tree.
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.
4883 Gibbs Rd, Plainfield, IN 46168
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278 N East St, Plainfield, IN 46168
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5150 Mecca St, Indianapolis, IN 46241
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7059 Eagle Rd, Indianapolis, IN 46278
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Distance measured from Avon.