When should I treat for bagworms?
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.
Why timing decides it
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.
Indiana specifics
A routine annual problem on Indiana evergreen hedging.
Related
- How do I know if my tree has bagworms?→
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- Is bagworms a problem in Indiana?→
- What does treatment for bagworms cost?→
- Does bagworms spread to other trees?→
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