Evergreen bagworm in forested areas are rare. With scarce predators in urban areas, evergreen bagworms often thrive in urban habitats. When disturbed, the larva will retract its head into its case and hold the front opening closed. Mature larva may remain in the host tree or drag its case nearby before attaching itself for the pupa stage. Arborvitae and red cedar are the favored host trees of the evergreen bagworm, but cypress, juniper, pine, spruce, apple, birch, black locust, elm, maple, poplar, oak, sycamore, willow, and over 100 other species are also attacked. Leaves and buds are both fair game for food.
Evergreen bagworm in the fall after their cases have turned brown, especially on evergreen trees. Various bacterial sprays such as Bt/Spinosad and stomach insecticides such as carbaryl (Sevin) are used to control infestations. Evergreen bagworm The evergreen bagworm ("Thyridopteryx ephemeraeformis"), commonly known as bagworm, eastern bagworm, common bagworm, common basket worm, or North American bagworm, is a moth that spins its cocoon in its larval life, decorating it with bits of plant material from the trees on which it feeds. The evergreen bagworm's case grows to a length of over 6 cm, tapered and open on both ends. Newborn larva are blackish