
Small spindle-shaped bags hanging from branches, made of the tree's own needles. Often mistaken for cones. It attacks arborvitae, spruce, juniper, cedar. occasionally deciduous trees.
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.
A routine annual problem on Indiana evergreen hedging.