The life cycle of silkworm before a butterfly the eggs develop into the silkworm. They eat for 20-30 days, consuming large amounts of mulberry leaves. The silkworm spins a cocoon for protection, to permit the development of the pupa or chrysalis. The cocoon takes about three days to be fully complete and is a similar size to a peanut shell.
The chrysalis emerges from the cocoon as a moth. In cultivated silk, the grub is terminated while still inside the cocoon so that the long filaments are maintained. The moths mate and the female lays more than 350 eggs. The moths then die