Bagworms are a form of caterpillar that form 1.5- to 2-inch-long bags that hang from their host, these bags tend to be mistaken for pinecones. They typically prefer species such as arborvitaes, junipers, spruces, pines, and cedars. When it emerges as a moth, only the male species will have wings. The female's main purpose is to mate and reproduce.
Neither the adult male nor female bagworm feeds but once the larvae hatches the larvae will feed for about six weeks. As the caterpillars grow they affect the tree more and more, initial signs of damage from bagworms include browning branch tips. As they grow in size they will strip the tree of their needles and leaves to build their cocoons. If the infestation occurs for multiple years this can eventually lead to the tree's death.
There are several treatment options available for bagworms. Fill out the form of this page or contact our office to consult with an arborist today!