Pests Bagworms

Bagworms feed mainly on evergreens, though they can be found on many deciduous trees and shrubs, forming a "pine cone-like" cocoon to live in. Bagworms overwinter as eggs in old "bags" that hang on trees, and hatch in June. New bagworm larva move throughout the plant and feed on leaves and needles. Bagworms pupate in the fall; males leave their bags and mate with females who stay in the bag. The female lays here eggs in the bag and dies.

"Bags' are difficult to penetrate with sprays, though easier in early spring than later in the year. Handpicking may be the best means to remove the bagworms, especially in the early spring before eggs hatch.

Control sprays should begin around the first of June as eggs hatch and form new bags. Several applications may have to be made throughout the month. Make sure to read and follow all labeled directions.

See: Fall webworms, Eastern tent caterpillars