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Q&A: Do bagworms kill trees?

Bagwoom cocoon
Bagworm cases are made with evergreen needles and leaf material

Q: Do bagworms kill trees?

A: If there is a large infestation of bagworms on an evergreen tree, it is indeed possible for them to kill the tree if the defoliation is severe. Bagworms can be a problem on deciduous trees as well, but they typically do not kill them.

Bagworms are a common pest in Maryland and we receive a lot of questions about how to deal with them. Fall and winter are the best time to remove and destroy the bags that contain the eggs.

Here are a few tips about the lifecycle of bagworms and how to control them.

Bagworm Basics

How to Control Bagworms

Learn more about bagworms and other common landscape insects on the Home & Garden Information Center website.

Have a question about tree and shrub care? Submit your question to Ask an Expert.

By Mary Kay Malinoski, Extension Specialist, University of Maryland Extension, Home & Garden Information Center

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