Hello everyone, today I will answer the following questions for you. Regarding the growth process of silkworm babies, many people still don’t know about the growth process of silkworms. Now let’s take a look at it together. Look!
Contents of this article
- The growth process of silkworm
- What is the growth process of silkworms
- What is the growth process of silkworms
- How many days does the growth process of silkworms take
- The growth process of silkworms >
- The growth process of silkworm
1. The growth process of silkworms
Silkworm eggs → hatch into silkworm ants (silkworm larvae) → eat mulberry leaves and grow into adults → spin silk and form cocoons → in the cocoon Transform into silkworm chrysalis → turn into silkworm moth after half a month → male and female silkworm moths will die within a few days after mating and laying eggs (even if they do not mate or lay eggs, they will die within a few days).
2. What is the growth process of silkworms
Silkworms The growth process is divided into four stages: egg stage, juvenile stage, pupa stage and adult stage1. After the silkworm hatches from the egg, it goes through the juvenile stage and feeds on mulberry leaves. As it continues to eat mulberry leaves, its body turns white and then begins to shed its skin2. When the skin is peeling, it lasts for about a day, like sleeping without eating or moving. This is called \”dormancy\”. After four molts, the larvae become the fifth instar before they start to spin silk and form cocoons. It takes two days and two nights for a five-year-old larvae to form a cocoon, where it will shed its skin for the final time and become a pupa. About ten days later, the silkworm moth emerges from the cocoon and emerges as a silkworm moth
3. What is the growth process of silkworm
Silkworm eggs: Silkworms reproduce with eggs. A female moth can lay 400 to 500 silkworm eggs. The color of silkworm eggs is light yellow or yellow when they are first laid. It changes to light red bean color or adzuki bean color after 1 to 2 days, and then changes to gray green or purple after 3 to 4 days, and then no longer changes. , called a fixed color. The outer layer of silkworm eggs is a hard egg shell, and the inside is yolk and serosa. The embryo in the fertilized egg continuously absorbs nutrients during its development and gradually develops into an ant silkworm. It crawls out of the egg shell. When the egg shell is empty, it becomes an ant silkworm. White or light yellowcolor.
Ant silkworm: When the silkworm hatches from the silkworm egg, its body color is brown or black, very small, and has many fine hairs. It looks a bit like an ant. That’s why it’s called ant silkworm. The ant silkworm is about 2 mm long and 0.5 mm wide. After crawling out of the egg shell, it will eat mulberry leaves in 2 to 3 hours.
Silkworms eat a lot of mulberry, so they grow very quickly and their body color gradually becomes lighter. But its appetite gradually decreased and even completely fasted. It spit out a small amount of silk, fixed its abdomen and legs on the silkworm seat, raised its head and chest, and stopped moving, as if it was asleep, which is called \”mian\”. The sleeping silkworm appears to be motionless on the outside, but its body is preparing to shed its skin. After shedding the old skin, the silkworm\’s growth enters a new stage. From the ant silkworm to the spinning of silk and cocoon, there are a total of 4 molts. .
Silkworm age: Also known as instar, it means that the silkworm baby is at a certain stage of development. From the time when the ant silkworm sheds its skin for the first time, it is the first instar; after it emerges from sleep, it enters the second instar; after it sheds its skin again, it enters the third instar; after the third molt, it enters the fourth instar. The fourth molt is also called the great sleep. After the deep sleep, they enter the fifth instar. The fifth-instar silkworm babies grow extremely fast, reaching a body length of 6 to 7 centimeters and a weight that can reach about 10,000 times the weight of the ant silkworm
Mature silkworms: At the end of the fifth instar, silkworms gradually show the characteristics of maturity: first, the feces excreted change from hard to soft, from dark green to leaf green; appetite decreases, and the amount of mulberry eaten decreases; front part The digestive tract becomes empty and the chest becomes transparent; then the silkworm stops eating completely, the body shortens, and the abdomen becomes transparent. The head and thorax of the silkworm\’s body are raised, the mouth spins silk threads, and it swings left and right to find a place to build a cocoon. Such silkworms are called mature silkworms. .
Cocooning: People put cooked silkworms in a special container or on a cocoon, and the silkworms will spin silk and form cocoons.
4. How many days does the growth process of silkworm babies take
1. Generally, the growth cycle of silkworms lasts more than forty days, and the length of its growth cycle is closely related to factors such as temperature, humidity, and food. The greening period is generally 10-11 days, and the larval stage is about 25 days.
2. The first instar is 4-5 days, the second instar is 3-4 days, the third instar is 4 days, the fourth instar is 6 days, and the fifth instar is 7-9 days, pupa stage 14-18 days, moth stage 3-5 days.
1. Silkworm eggs hatch: After the greening period, silkworms hatch out from the eggs. The newly hatched silkworms are black and small, also called ants. silkworm.
2. First instar: The color of first-instar silkworms will gradually change from black to dark brown. They eat mulberry for 3-4 days. They often don’t eat much at this stage. After the dormant period, It will undergo its first molt and sleep for 8-12 hours.
3. Second instar: The second instar silkworms are significantly larger in size and lighter in color. They eat mulberry for about 3 days and sleep for 8 to 12 hours.
4. Third instar: The body color of the third instar silkworm is light brown. At this time, the silkworm\’s food intake will increase, and it will enter the dormant period after 4 days. This stage ends All silkworms are called small silkworms, and they will enter the large silkworm stage after 10-14 hours.
5. Fourth instar: Silkworms in the adult stage develop faster and eat more. The fourth instar lasts for 5 days, but the dormancy period will be longer. Therefore, it is also called the great sleep period, which lasts for 30-40 hours.
6. Fifth instar: The fifth instar is the period when the amount of leaf eating is the largest. The amount of leaf eating in about 7 days will account for more than 75% of the total amount of leaf eating. After 7 days, the body of the silkworm will begin to shorten and become brighter. This phenomenon is also called mature silkworm. At this time, the mature silkworm will no longer eat, but will start to spin silk and form a cocoon.
5. The growth process of silkworms
1. The growth of silkworms The process is divided into four stages: egg, larvae, pupa and adult. 1. The silkworm baby hatches. The silkworm baby ant that just hatched from the egg is called an \”ant silkworm\”. Its body is covered with fine hairs. About two days later, The hair is no longer obvious.
2. 2. Silkworms grow up. Silkworms live on mulberry leaves. After eating mulberry leaves, their bodies turn white, and after a while, they begin to peel. When the skin is peeling, it lasts for about a day, like sleeping without eating or moving. This is called \”dormancy\”.
3. Third, after the silkworms spin silk and undergo one peeling, they become the second instar larvae. She sheds her skin once, which means she is one year older. She has to shed her skin four times in total, and she becomes the fifth instar larvae before she begins to spin silk and form a cocoon.
4. 4. The five-year-old larvae need two days and two nights to form a cocoon and molt for the last time in the cocoon. Become a pupa.
5. 5. About ten days after the silkworm emerges from the cocoon, it emerges into a silkworm moth and emerges from the cocoon.
6. After emerging from the cocoon, the female moth emits a breath from its tail.The smell attracts the male to mate, and the male dies immediately after mating. The female moth can lay about 500 eggs in about one night, and then she will die slowly.
6. Silkworm growth process
The growth process will go through incubation, Growth, spinning, cocooning, cocoon breaking. Silkworms reproduce with eggs, which are like fine sesame seeds, about 1 mm wide and 0.5 mm thick. As the temperature rises, the silkworm eggs begin to develop. After 7-15 days, when the silkworm eggs become transparent and the outline inside can be seen, it means that the silkworm babies are about to emerge. Silkworms that have just hatched from eggs are covered with fine hairs and are also called ant silkworms.
This is the end of sharing about the growth process of silkworm babies. I hope it can help you.
