Life cycle Young bagworms on juniper foliage

If you look closely, you will see them moving around as they feed on the plant.

This pest is sometimes confused with Eastern tent caterpillar. Conifers, especially arborvitae, cedar, juniper, and pine are the most frequently damaged host plants.ĭeciduous trees such as sycamore, maple, locust, boxelder, and linden are also attacked but they are not seriously damaged. Bagworm, Thyridopteryx ephemeraeformis (Haworth), is a serious insect pest of many ornamental shrubs and trees in the eastern half of the United States.