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How do I control bagworms?

Physically remove bags from trees during the winter. Be sure to completely destroy worms inside the bags.

Insecticide control needs to be aimed at young larvae in mid to late June to be effective.

Feeding by mature caterpillars slows in August before pupation into adults, so chemical control in late summer and fall is not effective.

Insecticides labeled for bagworm control include acephate, carbaryl (like Sevin), cyfluthrin, malathion and permethrin.

Affected plants must be thoroughly covered with the insecticide in June so the insects ingest it as they are feeding. Apply at the rate indicated on the product label. And be sure to read and follow all label directions.

Check your state and local codes before starting any project. Follow all safety precautions. Every effort has been made to ensure the accuracy and safety of this information. Neither Westlake nor any contributor can be held responsible for damages or injuries resulting from the use of the information in this document.

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