Many gardeners have seen these destructive worms in their landscape. Bagworms attach to stems and branches of many kinds of trees and shrubs. The evergreen bagworm is the most common. The larvae eats the foliage from the host plant and builds new bags with that foliage. The bags hang downward and are either gray or brown in color resembling small pinecones. Once you identify that your plant is infested it is best to rake up any debris around the tree and remove that debri. You can also cut the bags that you can reach from the plants using a knife of garden shear. Spraying with Bacillus Thuringiensis (BT), an organic control, is the best product to use around children and pets to get rid of the bagworms. Now is the time to treat any of your plants that have these pests. This winter you can spray with a dormant oil to prevent recurring infestations.