When did silkworm eggs become silkworms?

ventilate the silkworm babies that are about to hatch, otherwise they will be suffocated; The outer layer of the silkworm egg is a hard egg shell, and the inside is the yolk and serous membrane, and the embryo in the fertilized egg continuously ingests nutrients during the development process, and gradually develops into an ant silkworm, which crawls out of the egg shell, and the egg shell becomes white or light yellow after the egg shell is empty.

It takes about 33-34 days to change from a silkworm egg to a silkworm baby.

Its incubation period is 8-9 days, the larval stage is about 25 days, and the pupal stage is 14 days and 18 days. The silkworm moth period is 3 days and 5 days. The growth process of silkworms is divided into the following 6 instars, namely: silkworm egg hatching, first instar, second instar, third instar, fourth instar, and fifth instar.

1. Silkworm egg hatching: After 8 9 days of green stimulation, the silkworm baby hatches from the silkworm egg, and the silkworm is black and small, commonly known as ant silkworm.

2. First instar: The color of the first instar silkworm changes from black to dark brown, and the mulberry eating time is 3 4 days, and the amount of food is not large. After entering the sleep period, the first molt will be carried out, and the sleep period will last 8 to 12 hours.

3. Second instar: the silkworm body grows significantly, the color becomes lighter, the mulberry eating time is about 3 days, and the sleep period is 8 12 hours.

4. Third instar: The color of the silkworm body changes to light brown, the amount of food begins to increase, and it enters the dormant period after about 4 days. 1 3 instar silkworms are generally called small silkworms, and enter the large silkworm stage after 10 to 14 hours.

5. Fourth instar: The silkworm that enters the large silkworm stage develops very quickly, and the amount of food increases significantly. The 4th instar time is generally 5 days, and the sleep period is very long, generally called the large sleep period, and the sleep period can reach 30 to 40 hours.

6. Fifth instar: the period when mulberry cannibalizes the largest amount of leaves, and the amount of leaves eaten in about 7 days accounts for more than 75% of the total leaf eat. After 7 days, the silkworm body begins to shorten and become brighter, commonly known as the mature silkworm, the mature silkworm no longer eats, and begins to spin silk and form cocoons.

Conditions required for silkworm egg hatching:

1. The temperature condition for silkworm eggs to hatch into larvae is to keep the temperature in the range of 24-25 degrees, which is the best temperature condition for hatching silkworm eggs.

2. Pay attention to air circulation.

3. Appropriate humidity.

The practice of making silkworm eggs hatch as soon as possible is:

1. In the sterilized silkworm room, the silkworm eggs are spread in the silkworm plaque, the eggs are facing upward, the room temperature is required on the 1st to 4th day, the dry and wet difference is 2 -, and the room temperature is required to be 27 on the 5th to 10th day, and the dry and wet difference is required.

2. When a small number of silkworm eggs are found to be green and cracked, immediately darken the silkworm seeds with a black cloth, and after about 40 hours, that is, before dawn on the third day (generally before 4 or 5 o'clock in the morning), remove the dark black cloth, wrap the silkworm seeds in white paper, face the eggs upwards, turn on the light and sensitize, and let the ants and silkworms bite through the egg shell and hatch.

3. After 3-4 hours of sensitization, the spring silkworm is judged to be closed at 9 o'clock in the morning, and the summer and autumn silkworms can collect ants at 7-8 o'clock in the morning (that is, the newly hatched silkworms).

Silkworms, divided into two categories:

A type of silkworm, that is, mulberry silkworms. The Lord is going to feed on mulberry leaves. The other type is called mountain silkworms, that is, quercus silkworms, which feed on oak leaves.

Silkworms go through 4 stages in their life: eggs, larvae, pupa and moths. It is the larva of silkworm moth, the main raw material of silk products, and has an important position in human economic life and cultural history.

Native to southern China, the ancient text records that the emperor Xuanyuan began to raise silkworms, and the most famous in the south of the Yangtze River is the well-known wife of the Yellow Emperor. The staple food of mulberry silkworms is mulberry leaves, which can also be supplemented with a small amount of castor leaves. The cocoon is woven from a continuous silk with a length of about 300,900 metres (1,000,300 ft).

The adults and pupae of silkworms are edible and have therapeutic effects. Silkworm moths lay eggs and mate to reproduce offspring, and die after laying eggs. Because of its long history and economic importance, silkworm breeding has become an important object of modern scientific research.

After about ten days after the silkworm cocoons break out of the cocoon, then the male and female copulate, and then the male silkworm dies, and the female moth can lay about 500 eggs in one night.

Breeding method: 1) Prepare a large number of closed-source mulberry leaves, find a plastic box with a lid, spread blank scratch paper, put the silkworm baby into the box, spread mulberry leaves, and half-cover the box.

2) Silkworm babies will grow quickly, so they should pick a large number of mulberry leaves every day and feed them to silkworm babies in time.

3) The baby silkworm does not eat mulberry leaves when molting, and it will continue to eat mulberry leaves after 4 to 5 hours after molting. After molting 5 times, it will eat a lot of mulberry leaves, and when it raises its head, it means that it is about to form a cocoon. Move it to another wide box.

4) After 1 week, cut off the cocoons and move them to a napkin box. Put the lid on. After 2 weeks it will come out, let it be paired on a napkin and produce seeds.

5) If you want to hatch the second batch, put it at room temperature, and it will be born after 3 weeks. If you don't want to hatch, put it in a dark place that is not exposed to the sun.