You will know if they are still active if the bag wiggles and squirms when disturbed. If you find numerous bags and the larvae are still active, it is best to spray them with an insect control material. If the bag is just thrown on the ground and the larva is still active, they will crawl back in to the tree and continue feeding and will build a new bag. If you find a few bags hanging in a tree, pull them off and throw them in the garbage. These eggs will hatch the following spring and the whole process starts again. She will die in the late summer to early fall and the eggs overwinter within the bag. After the mating process is over, the male dies and the female will lay over 300 eggs within the bag. She awaits a visit from the male, who resembles a moth. The female never leaves the bag she created. The larvae exit the bags in search of food and return to the bag to hide from predators.
These bags are very strong and are somewhat camouflaged from view. The bag is made from bits of plant material along with silk that the larva produces. In severe infestations, the larva will find just about any suitable vertical surface on which to attach their bag, including the sides of buildings.
There are three major insect pests that are just ending their current life cycle, Bagworms, and two others that are just beginning to become active, Army Worms and several grub species.īagworms are easily recognized by the case or bag that the larva, a caterpillar, creates and suspends from a branch.
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