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• in the picture above,it is obvious that there are 4 main phases in the cycle of the silkworm.
• first of all,the moth produces eggs.it takes 10 days that the eggs of the silkworm will entre into the second phase---to become the silkworm larva.

First of all, eggs are produced by the moth and it takes ten days for each egg to become a silkworm larva that feeds on mulberry leaves.

• the silkworm larva will eat mulberry leaves for its life.and after 4~6 weeks,
  the silkworm larva begins to spit out silk thread and twist them around its body.

This stage lasts for up to 6 weeks until the larva produces a cocoon of silk thread around itself.

• after that,it takes 3~8days for the larva to spin a complete cocoon surrounding itself.it is the 4 phase.

After a period of about 3 weeks, the adult moths eventually emerge from these cocoons and the life cycle begins again.

• 16days later, the larva breaks out of the cocoon,finally,it becomes an aldult moth.so the life cycle of the silkworm begins again.