Answered for Danville, Hendricks County (county seat) County.
A routine annual problem on Indiana evergreen hedging. 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. An evergreen stripped by bagworms usually does not regrow those needles — arborvitae and spruce don't refoliate bare wood.
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
Small spindle-shaped bags hanging from branches, made of the tree's own needles. Often mistaken for cones.
Whether the tree can be saved
An evergreen stripped by bagworms usually does not regrow those needles — arborvitae and spruce don't refoliate bare wood. Catching them early is the difference between a treatment and a replacement.
Timing in Hendricks County (county seat) County
Spray in June when the larvae are small. After midsummer the bags are sealed and spraying does nothing — at that point picking them off by hand is the only option that works.
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