In the fall, the male moth emerges, flies to a female's bag, and mates. The female lays between 500 and 1,600 eggs within her bag. There is one generation annually. In most cases, bagworm outbreaks are quickly reduced by low winter temperatures and a complex of several parasites. On ornamentals around the home, it is often practical to control bagworms by picking and destroying the bags.
Chemical control is also effective.