Look at the growth process of silkworm.

Silkworm egg hatching: After 8-9 days of hatching, the larvae hatch from the eggs, which is called silkworm ants at this time.

First instar: lasts f

Look at the growth process of silkworm.

Silkworm egg hatching: After 8-9 days of hatching, the larvae hatch from the eggs, which is called silkworm ants at this time.

First instar: lasts for 3-4 days, when the young silkworms eat less and their color changes from black to dark brown.

Second instar: It lasts for 3 days, when the color of the silkworm becomes lighter and it has grown obviously.

Third instar: the silkworm's food intake increases and its color turns light brown.

Fourth instar: enter the big silkworm stage, lasting about 5 days, when the silkworm develops rapidly.

Fifth instar: The food intake reaches its peak, and when it becomes a mature silkworm, it will spin silk and cocoon.

Silkworm change record

1, silkworm eggs hatch

After 8-9 days of incubation, the ants hatch from the eggs, which looks dark and small at this time.

2, an age

It lasts for about 3-4 days, when the silkworm ants eat less and the color will change from black to dark brown. After entering the sleep period, molting will be performed 1 time, and the sleep period is 8- 12 hours.

3, the second element era

It lasts for about 3 days, when the silkworm body grows obviously and the color becomes lighter, and the sleep period is 8- 12 hours.

Four years old, three years old

Silkworms turn light brown and eat more. After 4 days, it enters the dormant stage, and after 10- 14 hours, it enters the big silkworm stage (1-3-year-old silkworms are called young silkworms).

Five years old, four years old

It lasts about 5 days. At this time, the silkworm body develops rapidly, and its food intake increases obviously, and the sleep period can generally reach about 30-40 hours (called the big sleep period).

Six years old, five years old

(1) At this time, the silkworm has the largest food intake, and its food intake can exceed 75% of the total food intake in about 7 days.

(2) It becomes a mature silkworm after 7 days. At this time, the silkworm body began to brighten and shorten, stopped eating, and then began to spin silk and cocoon.

2. What are the four stages of a silkworm's life?

1. Hatching: Silkworm eggs initially look like white sesame seeds, and then gradually turn black, hatching black young silkworms, that is, ant silkworms.

2. Growth: After eating mulberry leaves, the ant silkworms will gradually turn white, and after peeling for four times, they will become fifth instar larvae, and then they will start spinning.

3. Cocoon formation: Silkworms can form cocoons about 2 days after spinning and pupate in cocoons.

4. Adult: After pupation, about 10 days, the adult will break cocoon, mate and lay eggs in a short time, and then gradually die.