What are the uses of silkworm silk
Spring silkworms spin silk for their own growth and development needs. They spin silk to make cocoons to wrap themselves up in order to develop into pupae and finally develop into adults. The cocoon is a stage that silkworms must go through in their physiological development.
The silk-producing organ of the silkworm is called the silk gland, and silk comes from the silk gland. Newly hatched ant silkworms can secrete silk substances, and the silk strands they spin out are helpful for foraging and preventing them from falling off. Before each sleep, the larvae always spin silk on the silkworm seat to fix the silkworm body and facilitate molting; When mature, it spins silk and forms a cocoon, and undergoes metamorphosis in the cocoon. The cocoon shell has a protective effect on the pupa body; the secretion of silk material is only an excretion function for the larvae. For example, burning the front silk glands or blocking the spin holes during the silkworm stage prevents the discharge of silk materials. As a result, most silkworms die before pupating. By the second half of the fifth instar, the larvae have reached extreme growth, and their need for protein has been decreasing day by day. As they eat a lot of mulberry, there is an excess of amino acids in the body, and the silk glands grow rapidly. The silk glands absorb a large amount of amino acids from the blood and synthesize silk proteins. Spit it out when it is ripe to eliminate the contradiction of excess amino acids in the body. If these excess amino acids are not eliminated, they often accumulate in the fat body and other tissues, causing obesity. Moreover, due to the autolysis of protein, excessive accumulation and decomposition of amino acids will cause the larvae to be poisoned and die before pupation.
Spring silkworm is a kind of organism, which is a silkworm raised in spring. Spring silkworms are used in poetry and literary works to describe teachers and other people who are willing to contribute. Mainland China and Hong Kong have filmed movies and TV shows named after spring silkworms. Songs named after spring silkworms come from several countries. Raising silkworms requires sterilization and feeding, and finally produces cocoons.
Silkworms are Lepidopteran insects, and their life can be divided into four stages: egg, larvae, pupa, and adult.
Spring Silkworm
Silkworms that have just hatched from eggs are black and hairy, resembling ants, and are called ant silkworms. The ant silkworms slowly grew up eating mulberry leaves. After a while, they could not move without eating, and they entered head sleep, just like a human being sleeping. After one or two days, it shed a layer of skin and began to eat mulberry leaves again, and its body continued to grow. Repeat this four times until maturity is reached. From first sleep to fourth sleep, it takes about a month. After eating a pound of mulberry leaves, the body grows forty times and the weight increases about nine thousand times.
A mature silkworm is composed of many links, and the whole body is divided into three parts: head, chest and abdomen. Its head is very small, with a pair of hard jaws that open and close inward from left to right to chew mulberry leaves for food. The chest has three segments, each segment has a pair of thoracic feet; the abdomen has ten segments, and each segment from the third to the sixth segment has a pair of abdominal feet. The thoracic feet and abdominal feet are the organs of movement. There are tail legs at the end, which are used to climb mulberry leaves.
There is a pair of special organs called silk glands inside the body of silkworms. Mature silkworms have transparent bodies and are filled with silk. It wraps itself in a cocoon by twisting its head and spinning silk, surrounding its body. After spinning the silk, it sheds its skin again, turning into a pupa the size of a peanut. It can't move until it eats, and it lies dormant in the cocoon. Ten days later, the pupa turns into a moth and emerges from the cocoon. After mating, the male moth dies first, and the female moth ends its life after laying eggs. Each female moth lays 500 to 700 eggs.
Refers to silkworms raised in spring. The raising period is often affected by various influences such as ground temperature, climate, farmland operations, etc., especially the germination of mulberry trees. Generally, ants are collected in early May, but in warm places, it is late April. The cocoons of spring silkworms are large in shape, and the cocoon silk has thick fineness, and generally the silk quality is good. This is also the raw material for silk, one of China’s specialties. Due to the large number of mulberry trees and the mild climate, silkworm breeding is the main economic mainstay in the south. Therefore, the "mulberry-based fish pond" economic model has emerged in some villages. Silkworm cocoons come in many colors, but yellow and white are more common, while red and blue are rare. Colored silks are mostly artificially dyed.
What do silkworms need to do when they spin silk?
In a box, put some cardboard partitions horizontally and vertically, and put the transparent silkworms that do not eat anything inside,
That's it. It will find a place to spin silk by itself~ This can be done if you raise a few silkworms for fun.
If you raise them in batches, you need to set up a shelf~
What are the silkworms? use?
Silkworms
Varieties of silkworms
Mulberry silkworms
Also known as domestic silkworms, they use mulberry leaves as food to spin silk and form cocoons economically. One of the insects. It belongs to the order Lepidoptera, family Bombyx moth, and its scientific name is Bombyx mori Linaeus. Silkworms originated in China. Their development temperature is 7-40°C and the suitable breeding temperature is 20-30°C. They are mainly distributed in temperate, subtropical and tropical areas.
Mulberry silkworms are oligophagous insects. In addition to eating mulberry leaves, they can also eat mulberry leaves, mulberry leaves, elm leaves, duck onions, lettuce leaves, etc. Mulberry leaves are the most suitable for silkworms. Natural food. Silkworms are insects that undergo complete metamorphosis and go through four completely different developmental stages in terms of morphology and physiological functions: egg, larvae, pupa, and adult. In the larval stage, under suitable temperature conditions, it takes 22-26 days from hatching to spinning and cocooning. A silkworm eats about 20-25g of mulberry leaves in its lifetime. It usually sleeps and molts four times. When it reaches the extreme growth stage, its weight increases by about 1 Ten thousand times. The amount of mulberry leaves eaten in the late stage accounts for more than 85% of the total amount of mulberry leaves eaten. The cocoons spun by mulberry silkworms can be reeled into silk, which is an excellent textile fiber and the raw material for satin. The pupae of silkworms are edible, and both silkworm moths and silkworm feces are comprehensively utilized and are raw materials for various chemical and pharmaceutical industries.
Tussah silkworm
An insect that spins silk and spins cocoons that feeds on tussah leaves. It belongs to the order Lepidoptera, family Silkwormidae, and its scientific name is Antherea pernyi Guerin-Meneville. Originating from China, the growth temperature is 8-30℃, the optimum temperature for growth is 11-25℃, and the most suitable temperature is 22-24℃. Mainly distributed in China. It is also distributed in small quantities in North Korea, South Korea, Russia, Ukraine, India and Japan.
Tussah silkworms feed on the leaves of Quercus plants in the Fagaceae family, such as oak trees, oak trees, and oak trees. They can also feed on the leaves of wormwood, willow, chestnut, maple, pear, apple, and other plants. . Tussah silkworms are completely metamorphosed insects and go through four developmental stages with completely different shapes and physiological functions: egg, larvae, pupa, and adult. After four sleeps and molts. Each molt increases the age by 1 year. It takes about 50 days for a silkworm to hatch and form a cocoon at the fifth age. Spring silkworms eat about 30-35g of leaves in their lifetime, and autumn silkworms eat 50-58g of leaves. Among them, large nibblers account for more than 80% of the total leaf consumption. The weight of spring silkworm is 14g, and that of autumn silkworm is about 21g. When reaching the extreme growth stage, their body weight increases by approximately 2000-3000 times compared to ant silkworms. Tussah cocoons can be reeled into silk, and tussah silk is the raw material for tussah silk. Tussah silkworm pupae are edible, and together with moths, they are raw materials for the chemical, pharmaceutical, and food industries. Eggs are good intermediate hosts for Trichogramma wasps used for biological control.
Ricinus silkworm
One of the economic insects that feeds on castor silkworm leaves and spins silk to form cocoons. The castor silkworm belongs to the order Lepidoptera, the family Boisduval, and its scientific name is Philosamia cynthiaricini Boisduval. The castor silkworm is native to Assam in northeastern India. It began to spread from India in the 18th century to China, the United States, Sri Lanka, Malta, Italy, the Philippines, Egypt, Japan, North Korea and other countries have introduced and raised them. The castor silkworm goes through four developmental stages: egg, larvae, pupa and adult. The egg stage lasts about 10 days, the larvae sleep for 4 and 5 instars for 20 days, the pupa stage lasts for about 20 days, and the completion of one generation takes about 45-50 days. It is difficult to hatch when the egg stage is below 16.5℃ or above 32℃, and the suitable temperature is about 25℃; the suitable temperature for raising the larvae is about 24℃; the appropriate protective temperature for the pupa stage is about 25℃, and the relative humidity is 75% --90%. When reaching the growth extreme, the weight is about 7g, which is about 5400 times larger than that of ant silkworms.
Castor silkworm cocoons cannot be reeled, but can only be used as raw materials for spinning castor silk. There are also castor blended silk blended with silkworm waste silk, oak waste silk, ramie, chemical fiber, etc.
Cassava silkworm
When castor silkworms feed on cassava, they are commonly called cassava silkworms in production. It is actually the castor silkworm. In 1956, Guangxi Cenxi County successfully tried raising castor silkworms with cassava leaves, and later expanded to neighboring counties to raise castor silkworms, which are now called cassava silkworms. Guangdong and Fujian were also raised successively. Its habits and characteristics are the same as those of castor silkworm.
Horse mulberry silkworm
When castor silkworm feeds on horse mulberry leaves, it is commonly known as horse mulberry silkworm in production. In 1965, the Hunan Tu and Miao Autonomous Prefecture Sericulture Experimental Station successfully raised castor silkworms using wild mulberry leaves. Because it is called horse mulberry silkworm. The development of silkworms when reared with mulberry silkworms is slower than that with castor leaves. It takes 2-4 days to reach full age, but the weight of the cocoon layer is the same, which can reach 0.34-0.42g. Hunan, Hubei, Guizhou, Sichuan, Guangxi, Gansu, Shaanxi and other provinces have also raised them. Its habits and characteristics are the same as those of castor silkworm.
Huili silkworm
The castor silkworm. It is the transliteration name of castor silkworm.
The origin of castor silkworms is India... >>
What are the symptoms before silkworms spin silk
The amount of leaves they eat will become less and less, and the rope ladder will slowly It's a little transparent or yellow, and it will crawl around. If you give it mulberry leaves, it won't eat it. The same goes for my ginseng. Where is the cocoon it made yesterday