CATDOLL : CATDOLL: What are the three steps in silkworm rearing? (What are the three steps in silkworm rearing?)

1. How many steps are there in silkworm breeding?

There are five stages in silkworm rearing: silkworm eggs - larvae - mature silkworms - silk cocoons - silk moths, which takes a total of more than forty days.

Additional information

Sericulture is an important skill created by the working people in ancient China. It is said that the method of planting mulberry trees and raising silkworms originated from Leizu, the wife of Huangdi. The ancestor of the domestic silkworm is believed to be the wild silkworm (B. mandarina), which is almost the same as the domestic silkworm in appearance, and can naturally hybridize with the domestic silkworm to produce offspring after growing up.

Place the silkworms in a paper box or a small sieve for sifting rice. If using a sieve, place some paper at the bottom of the sieve.

When the silkworms have just hatched from the eggs, you need to be especially careful with them, feed them with relatively tender mulberry leaves, and use a very soft brush to move them when changing the mulberry leaves, and pay attention to the strength; sometimes the mulberry leaves are too dry, and if you are not careful, the silkworms will be left on the mulberry leaves that are about to be discarded. It is a little difficult to raise them when they are young, but it will be easier to handle when they grow up.

When it is about to make a cocoon, just take some wheat straw and tie it into the shape of branches.

After the moths break out of their cocoons, place them together in a box. They will mate together and lay eggs. Sometimes, because there are few silkworms, some moths will be left alone when they break out of their cocoons, but don't worry, as long as one pair of moths succeeds, I believe it will be enough for you to raise.

Mulberry leaves should be fresh. You can also collect them in a plastic bag each time, use a few leaves a day, and keep the rest in the refrigerator (4℃) to keep them fresh (do not water them, as the leaves will turn yellow quickly if you water them. It is recommended to seal them in a fresh-keeping bag). The collected leaves will have some dust, so you can wash them and dry them. You must dry them, otherwise the young or adult silkworms will have diarrhea after eating them, and they may even die.

2. What is the process of raising silkworms?

step

(1) Place the silkworm eggs in a clean and odor-free silkworm rearing box. From the time the silkworm eggs leave the warehouse, they will naturally hatch into larvae in about 11 days (including the shipping time) at room temperature of 21-29°C.

(2) The larvae begin to have an appetite about 40 minutes after hatching, and can be fed. You can cut the mulberry leaves into small pieces with a knife and put them in the silkworm box. The silkworms will actively climb onto the mulberry leaves to eat. For 1-3 day old silkworms, you can choose tender mulberry leaves, and for 4-5 year old silkworms, you can use ordinary mulberry leaves.

(3) Silkworms grow well in an environment of 22-29°C, with the optimum temperature being around 27°C. Feeding can be done in the morning or at noon.

3. The whole process of silkworm rearing?

1. Hatching silkworm eggs: Place the silkworm eggs in a warm place such as an electric blanket or pocket.

2. Feeding food: Provide silkworms with fresh, dry mulberry leaves once a day.

3. Clean regularly: Clean the paper box once a day to remove any remaining food and feces.

4. Note: When the silkworms are making cocoons, put some dry branches and bamboo strips in the paper box.

4. How many stages does a silkworm go through in its life? How long does each stage last?

The silkworm is an insect that has made a huge contribution to our daily life. Its life is relatively short. It goes through four stages: silkworm eggs, larvae, pupae and silk moths. Generally, the life cycle of a silkworm is about fifty days.

The silkworm goes through four stages in its life cycle: eggs, larvae, pupae, and moths. The silkworm is the larvae of the silkworm's life cycle, and the moth is the adult of the silkworm. The moth dies after mating and reproduction. The silkworm goes through four stages in its life cycle: birth, growth, development, reproduction, and death. This is the life cycle of a silkworm.

1. Silkworm eggs

The silkworm is an insect that relies on eggs for reproduction. Under normal circumstances, the dormant period of silkworm eggs is 7 days after laying eggs, from summer, mid-autumn festival to late October. After the silkworm eggs enter winter, they are exposed to a certain degree of low temperature, and the silkworm eggs will gradually end the dormancy and become active eggs. If the activated silkworm eggs feel a certain temperature, the embryos will gradually develop and hatch. Therefore, the old silkworm eggs need to be refrigerated in winter.

2. Larvae

After the silkworm eggs hatch, they break out of their shells and become larvae. When they are just born, the silkworms are not yet formed and look like soft strands. After 5 to 8 days, the silkworms begin to grow bigger and bigger and finally develop into larvae.

3. Silkworm pupae

After about five days of silkworm cocooning, the whole body will be wrapped in silk and become a pupa. The pupa is divided into three parts: head, thorax and abdomen. Its head is very small, with compound eyes and antennae. When the silkworm just turns into a pupa, its body is light yellow and soft, and gradually it will turn yellow, and the pupa skin will become hard. Don't underestimate the silkworm pupa, its nutritional value is very high. Silkworm pupa is a pure green food with a very high protein content. It is said that the nutritional value of a silkworm pupa is equivalent to that of two eggs. Silkworm pupa can regulate the body's sugar and fat metabolism to a certain extent, and silkworm pupa oil can reduce blood lipids and cholesterol very well. This active product can effectively increase the level of white blood cells in the human body, thereby improving the body's immune function, and can effectively delay the aging process of human body functions.

4. Silkworm moth

The silkworm moth looks like a butterfly, with white scales all over its body, but because its two pairs of wings are small, it has lost the ability to fly. The female moth is large and crawls slowly; the male moth is small and crawls faster, and its wings flutter rapidly, looking for a mate. Generally, after mating for 3 to 4 hours, the female moth can lay fertilized eggs. The silkworm moth (adult) leaves offspring and dies soon after. The eggs laid by the silkworm moth → hatch → turn into pupae → turn into moths, completing the cycle of a new generation. This is the life cycle of the silkworm, which is about 50 days.

5. What are the summary stages of silkworm rearing?

1. Stages of silkworm development

This small animal generally goes through four different stages in its life. These four stages are eggs, which are silkworm eggs, larvae, silkworm pupae, and finally adults, which are what we call silk moths.

2. Growth from larva to pupa

The life of a silkworm is about 50 days, which can be said to be relatively short. However, in these 50 days, the silkworm undergoes great changes every day. The growth process from larvae to pupae is the main part and the most changing. The silkworm needs to go through constant sleep and molting from larvae to mature pupae. First, when the larvae hatch from the eggs, they need to eat leaves for three days, then stop eating and sleep, and when they wake up again, they will molt and become second-instar silkworms. Then, according to this method, the second-instar silkworms will eat leaves for a few days and then molt and sleep again, and then become third-instar silkworms. The third-instar silkworms also need to take in a lot of food, and eventually become fourth-instar silkworms. When the fifth-instar silkworms mature, their bodies will become translucent, and at this time they will spin silk and become silkworm pupae.

6. What is the sequence of changes during a silkworm’s life?

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

1. The silkworms have hatched

The silkworm ants that have just hatched from their eggs are black and are called "ant silkworms". They are covered with fine hairs, which will not be noticeable after about two days.

2. The silkworms have grown up

Silkworms feed on mulberry leaves. After continuously eating mulberry leaves, their bodies turn white. After a period of time, they begin to shed their skin. The molting period lasts for about a day, and they do not eat or move, just like sleeping. This is called "hibernation."

3. The silkworms are spinning silk

After molting once, it becomes a second-instar larva. Each time it molts, it ages one year older. It has to molt four times in total, becoming a fifth-instar larva before it begins to spin silk and make cocoons.

4. The silkworms are producing cocoons

It takes two days and two nights for a five-year-old larva to form a cocoon, and then shed its skin for the last time in the cocoon to become a pupa.

5. Silkworms emerge from their cocoons

After about ten days, the moth emerges from its cocoon and becomes a silkworm moth. After emerging from the cocoon, the female moth emits a scent from its tail to attract the male to mate. After mating, the male dies. The female moth can lay about 500 eggs in one night and then slowly dies.

7. What is the whole process of silkworm rearing?

There are five stages in silkworm rearing: silkworm eggs - larvae - mature silkworms - silk cocoons - silk moths, which takes a total of more than forty days.

Ant silkworm: When the silkworm hatches from the egg, its body is brown or reddish brown, very small, and has many fine hairs, which looks a bit like an ant, so it is called an ant silkworm. The ant silkworm is about 2 mm long and 0.5 mm wide. After it crawls out of the egg shell, it will eat mulberry leaves after 2 to 3 hours.

The sleeping nature of silkworms: Silkworms eat a lot of mulberry, so they grow very fast and their body color gradually fades. But their appetite gradually decreases or even completely stops eating. They spit out a small amount of silk, fix their abdomen and feet on the silkworm seat, raise their head and chest, and stop moving, as if they are asleep. This is called "sleeping". The sleeping silkworms may seem motionless on the outside, but they are preparing to shed their skin inside. After shedding the old skin, the silkworms enter a new age. From ant silkworms to spinning silk cocoons, they shed their skin four times in total. Having the sleep nature is one of the growth characteristics of silkworms. Sleep nature is a genetic trait of silkworms and is also affected by the environment. The silkworms currently raised in my country belong to the four-sleeping varieties.

Silkworm age: also known as age period, which indicates the development stage of the silkworm. From the ant silkworm to the first molt is the first age; after waking up from sleep, it enters the second age; after molting again, it enters the third age; after the third molt, it enters the fourth age, and the fourth molt is also called the long sleep. After the long sleep, it enters the fifth age. The fifth-age silkworm grows very fast, with a body length of 6 to 7 cm and a weight of about 10,000 times the weight of the ant silkworm.

Mature silkworms: When silkworms reach the end of the fifth instar, they gradually show the characteristics of maturity: first, the feces they excrete change from hard to soft, and from dark green to leaf green; their appetite decreases, and the amount of food they eat decreases; the front digestive tract is empty, and the chest becomes transparent; then they stop eating completely, their bodies shorten, and their abdomens tend to be transparent; their head and chest are raised, they spit out silk threads from their mouths, and they swing left and right and up and down to find a place to build their cocoons. Such silkworms are called mature silkworms.

Cocooning during the adult stage: People put mature silkworms in special containers or on cocoons, and the silkworms will spin silk and make cocoons.