Answered for Danville, Hendricks County (county seat) County.
Magnolia scale is the one people call about here. In Danville, the Main Street Historic District developed circa 1844–1920 across just 9 acres and 37 contributing buildings, and the Courthouse Square district circa 1865–1960 over 70 acres — those blocks hold the town's oldest and largest trees on narrow lots with sidewalks on both sides. Danville does actively manage its right-of-way canopy through a standing Tree Advisory Committee, though the specific inventory and replanting-ratio requirements attributed to Chapter 97 could not be verified. Rarely kills an established tree but weakens it and makes a mess.
Danville's canopy and what's at risk
The Main Street Historic District developed circa 1844–1920 across just 9 acres and 37 contributing buildings, and the Courthouse Square district circa 1865–1960 over 70 acres — those blocks hold the town's oldest and largest trees on narrow lots with sidewalks on both sides. Danville does actively manage its right-of-way canopy through a standing Tree Advisory Committee, though the specific inventory and replanting-ratio requirements attributed to Chapter 97 could not be verified.
What to look for
Bumps on twigs that scrape off, sticky honeydew, black sooty mould on leaves and anything parked underneath.
Whether the tree can be saved
Rarely kills an established tree but weakens it and makes a mess. Heavy infestations need two seasons to clear.
Timing in Hendricks County (county seat) County
Dormant oil in late winter, or a systemic timed to the crawler stage — timing is everything with scale and a spray at the wrong week does nothing.
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