If my juniper has little brown bags hanging on it does it mean there is a insect problem?

My juniper has little brown bags hanging in it. It looks like something is eating the juniper, but I don't see any bugs.
Submitted by BHGPhotoContest

The little brown bags you're seeing in your juniper are the protective cases of bagworms. The worm (larva) inside each bag eats the buds and foliage of the juniper. While it is feeding and growing, it carries its "house" with it. Once it matures, the larva attaches its bag to a branch. Bagworms have a single generation per year. Eggs hatch in late spring, and new larvae begin to feed immediately. At first the bag is only about 1/8 inch long. If you notice them, this is the best time to control them biologically or chemically. These controls are ineffective on mature bagworms. If your trees and shrubs have few bagworms, handpicking is an option. Pick them off the plant and squash them. If you notice that your plant has immature bagworms, you can spray it with Bt (Bacillus thuringiensis) in late spring or early summer, after all the eggs have hatched. Many chemical insecticides are also labeled for control of bagworm.


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