Eggs are laid in the fall and hatch in the spring. Caterpillars grow throughout the summer and pupate in August or September. After a 3-week pupal period, the adult moths emerge. After mating, the females deposit their eggs and die.

What time of year do bagworms hatch?

Bagworms pass the winter as eggs (300 or more) inside bags that served as cocoons for last year's females. The eggs hatch in mid- to late May in central Kentucky and the tiny larvae crawl out to feed.

Where do bagworms lay their eggs?

Eggs: Shortly after mating, the female lays a large egg clutch (500-1,000 eggs) inside of her pupal case enclosed within her bag. The eggs are smooth and cylindrical in shape and laid in a mass that is covered in a waxy, tuft-like layer (Peterson 1969). Bagworm eggs will overwinter.