Bagworm moth

Bagworm moth (Psychidae) is a family of the Lepidoptera order of insects, whose larvae are known for their unique habit of creating protective cases out of silk and environmental materials such as sand, soil, lichen, or plant materials. These cases are attached to rocks, trees or fences while resting or during their pupa stage, but are carried everywhere by the larva.

Life Cycle

The life cycle of the bagworm moth begins when a female lays her eggs in her own bag, which can contain hundreds to over a thousand eggs. The eggs overwinter and hatch in the spring, and the larvae immediately begin to construct their own bags. The larvae carry their bags around as they feed on the leaves of a wide variety of trees and shrubs, including juniper, arborvitae, cedar, spruce, and pine.

Sexual Dimorphism

Bagworm moths exhibit extreme sexual dimorphism. While male bagworm moths are typical moths, with wings and the ability to fly, females are flightless and often lack functional legs, antennae, and wings. After pupation, females remain in their bags, emitting pheromones to attract males for mating.

Control

Bagworm moths can become serious pests, as heavy infestations can defoliate and kill trees and shrubs. Control methods include handpicking bags, biological controls such as parasitic wasps, and chemical insecticides.

See Also

• Lepidoptera
• Sexual dimorphism
• Pheromone