What are the 6 processes of change in the life of a silkworm?

The six changes in the life of a silkworm are eggs, larvae (silkworm), pupal (cocoon), adult (moth), small silkworm stage, and large silkworm stage, which are described as follows.

1. Egg: It is oval, more than millet grains.

It is also a little smaller, gray-green or gray-purple in color, about 1700-1800 grains per square centimeter.

2. Larvae (silkworms): The appearance of silkworms is divided into head, thorax and abdomen. The head is what is commonly referred to as the mouth, the chest has three links, there are three pairs of chest and feet, and the abdomen has ten links, and there are four pairs of abdomen and feet. There are about 2100-2300 ants and silkworms per square centimeter.

3. Pupae (cocoon): pupation on the 5th day after the mature silkworm is clustered. The pupae are spindle-shaped, yellowish-brown.

4. Adult insect (moth): has a pair of white scale wings, but cannot fly. Copulation lays eggs and dies 2-day later. A moth lays about 400-600 eggs.

5. Silkworm stage: Generally, the first to third instar is called the silkworm stage. First Age:

From hatching to before the first peeling, it is called the first instar. The sleeping period is called head sleep. Three to three and a half days of age.

In the early stage, the silkworm body is small, full of bristles, and the body color is black and brown like an ant, so it is called ant silkworm. Second instar: After the first peeling to before the second peeling, it is called the second age, and the sleeping period is called second sleep.

The second instar is shorter than all other ages. Third instar: From the second peeling to before the third peeling, it is called the third instar.

6. Silkworm stage: the fourth to fifth instar is called the silkworm stage, and the fourth instar: from the third peeling to the fourth peeling before the fourth peeling. The sleep period is called the four sleeps. Commonly known as the Great Sleep.

After about 5 to 6 days of age, the markings on the silkworm body are clearer. Fifth instar: from the fourth peeling to the upper cluster, called the fifth instar, after about 7 to 8 days. The body of the silkworm is hypertrophied, the markings are clear, and the weight of the silkworm increases by about 10,000 times from the ant silkworm to the fifth instar feeding period.

Eggs, larvae (silkworms), pupae (cocoons), adults (moths), small silkworm stage, large silkworm stage.

1. Hatching: The silkworm baby is hatched from the egg, the silkworm egg is similar to the white sesame seed at first, and when it slowly turns black, the silkworm baby will drill out of the egg shell, and the newborn silkworm baby is black, like a small ant, so it is also called the ant silkworm.

2. Growth: After the ant silkworm begins to eat mulberry leaves, its body will slowly turn white, and after four times of peeling, it will grow into a fifth-instar larvae, at which time the silkworm baby will find a suitable position and begin to spin silk.

3. Cocooning: After the silkworm baby begins to spin silk, it generally takes two days to make the silkworm cocoon and transform into a silkworm chrysalis in the cocoon.

4. Adult: about 10 days or so, the silkworm pupae will break out of the cocoon, feather into an adult, and complete mating in a short time, and gradually die after laying fertilized eggs.