Answered for Carmel, Hamilton County.
Common on Indiana maple and linden in mid-summer. In Carmel, carmel Urban Forestry publishes an approved species list (last revised 3/28/2024) whose "Undesirable Trees" section reads like a field guide to what fills older Hamilton County streets: silver maple (shallow roots, weak wood), Callery pear, pin oak, red maple and all Fraxinus for emerald ash borer. Approved large street trees run to swamp white oak, bur oak, chinkapin oak, hackberry, male-only ginkgo, thornless honeylocust, Kentucky coffeetree, baldcypress and London planetree; note Callery pear is discouraged locally but is not yet banned in Indiana — 312 IAC 18-3-25 currently lists 44 species without it. Rarely a health problem for a mature tree.
Carmel Urban Forestry publishes an approved species list (last revised 3/28/2024) whose "Undesirable Trees" section reads like a field guide to what fills older Hamilton County streets: silver maple (shallow roots, weak wood), Callery pear, pin oak, red maple and all Fraxinus for emerald ash borer. Approved large street trees run to swamp white oak, bur oak, chinkapin oak, hackberry, male-only ginkgo, thornless honeylocust, Kentucky coffeetree, baldcypress and London planetree; note Callery pear is discouraged locally but is not yet banned in Indiana — 312 IAC 18-3-25 currently lists 44 species without it.
Sticky honeydew on everything under the tree, curled leaves, ants running up the trunk, sooty mould following.
Rarely a health problem for a mature tree. It's a nuisance problem — the honeydew is what makes people call.
Usually resolves on its own as predators build up. Treatment is for the mess, not the tree.
152 Lotus Dr Apt 1, Carmel, IN 46032
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111 Shoshone Dr, Carmel, IN 46032
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14500 Dublin Dr, Carmel, IN 46033
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14706 Harvest Dr, Carmel, IN 46032
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4621 E 146th St, Carmel, IN 46033
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10503 Becker Ct, Fishers, IN 46038
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Distance measured from Carmel.