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Each stage of the silkworm cycle takes time, as shown below:

Eggs hatch in about 6-20 days.
Caterpillars eat for about 26 days before spinning silk.
It takes about 3 days to fully spin a cocoon and turn into a pupa.
The moth emerges from the cocoon after about 21 days.
The moth lays eggs about two days  after emerging from the cocoon.

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