The growth process of silkworms is divided into four stages: egg, larva, pupa and adult

1, egg

At this time the silkworm is a pile of eggs.

2, larvae

Hatched from the eggs of the silkworm baby black, baby silkworms like ants known as ants silkworms, body full of fine hair, about two days after the hair is not obvious. They eat mulberry leaves for a living, and after eating mulberry leaves, their bodies slowly turn white, and after a period of time they begin to shed their skin.

It takes about a day for the silkworm to shed its skin, and it is called hibernation because it does not eat or move as if it were sleeping. After shedding its skin once, it is a second instar larva, and it is considered to be one year older if it sheds its skin once, and it has to shed its skin four times in a **** to become a fifth instar larva.

3, pupa

To the fifth larval stage began to spit cocoon. It takes two days and two nights for the fifth instar larva to form a cocoon and shed its skin one last time in the cocoon to become a pupa.

4. Adults

After about ten days, they break out of the cocoon and feather into silkworm moths.

Expanded Information:

Silkworm's growth habit:

Silkworm developmental temperature is 7 to 40 ℃, the feeding temperature is 20 to 30 ℃. Silkworms live on mulberry leaves, and their bodies become white when they keep eating mulberry leaves, and they begin to shed their skins after a period of time. About a day's time, it shed skin once even if the increase in the age of one year, the larvae *** to shed skin four times, become a five-year-old larvae, and then eat mulberry leaves for eight days to become mature silkworms, began to spit silk cocoons.

Silkworms are the main source of raw materials for silk, in northern China, "sericulture pupa" is a traditional food.