Silkworm will molt and pupate in the cocoon after cocoon formation, break out of the cocoon after 8 ~ 10 days, and die naturally one week after mating and spawning.
So after cocoon formation, you can lay a piece of white paper at the bottom of the clean and tasteless carton and hang a layer of white paper around it. When the cocoon is put into the box, the broken silkworm moth will mate and the female moth will lay eggs on the paper.
In cocoon production, if the pupa is transformed into an adult, the cocoon will naturally dissolve and drill out. Because the cocoon breaks through the hole, the silk thread will become shorter. Therefore, it is necessary to put the cocoon into boiling water, kill it before it breaks through the hole, and make it easy to disintegrate.
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Causes of cocoon formation in silkworms
Physiologically, protein, which constitutes silk gland, is composed of amino acids. If there are too many amino acids in silkworm body, it will poison silkworm body, so silkworm needs to spin silk to solve amino acids in order to achieve the purpose of detoxification.
In terms of natural conditions, silkworm, as a completely abnormal insect, is very fragile in every stage of its life, especially in the pupa stage, it will stop feeding, lose its mobility and be vulnerable to natural enemies.
Silkworms have evolved the behavior of spinning and cocooning, enclosing themselves in dense cocoons, which can not only protect themselves from natural enemies, but also safely become silkworm chrysalis in cocoons, so that the organs in silkworm chrysalis become the shape of silkworm moths, and finally emerge into silkworm moths.
The process of spinning silk is cruel.
Because silkworms only eat mulberry leaves all their lives, what they spit out when they are old is its soft, smooth and white silk, so there is a poem "Spring silkworms must weave until they die" to praise those who have dedication. This sentence comes from Li Shangyin's famous sentence "Spring silkworms die, and the candle is dying".
Silkworm moth belongs to LEPIDOPTERA, Silkworm moth family, and its temperament is docile. Silkworms have to change their clothes four times in infancy. When they are mature, they will sleep without eating, which is the so-called "silkworm sleep period". Soon, they will use up all the residues and waste liquid in their bodies and start to spit out white silk and weave cocoons. Silkworm larvae spit out all the silk in the cocoon, stay for a few days, shed wrinkled old skin, and become round and chubby yellow-brown pupa, which is called "baby pupa". Soon it became a winged silkworm moth, broke its cocoon and was free. Because they have long been domesticated from the wild, their real names are silkworm moths.
As we all know, silkworms can spin silk and form cocoons, but how silk is made is not always clear. It turns out that silkworm larvae have a complete and complex silk-making system called silk gland. Silk gland is connected to the spinning bubble called extruder under the machine head, and these two basic parts form a "natural textile machine". There are silk glands in the old larvae, which are composed of two rows of cells, which are five times longer than the body and communicate with the sac for storing silk fluid. The head squeezer is connected with the surrounding muscles. When silkworms spin silk, the muscles in the head expand and contract continuously, and the silk fluid in the silk gland is pumped out. When the silk liquid comes into contact with air, it forms slender silk.
When a silkworm spins silk and forms cocoons, its head always swings from side to side. If you look at it carefully with a magnifying glass, the cocoons of silkworms are arranged in a very neat "8" shape, and every 20 silk circles are called a silk column. When one end of the cocoon is woven, it will make a 1800 turn and start weaving the other end of the cocoon. Therefore, the silkworm cocoon is slightly thicker at both ends and slightly thinner in the middle, much like a peanut. Every time a silkworm completes a cocoon, it needs to change its position 250-500 times to weave about 60 thousand "8" silk circles, each of which is about 0.72 cm long. This is how silkworms weave and weave. After all the silk in their bodies is exhausted, they turn into moths, which are inoculated and handed down from generation to generation for the benefit of mankind from generation to generation.
Zombie silkworm photo
Because they have mysterious manipulation ability, because in nature, there are many examples of fungi being manipulated after infection. For example, the behavior of ants infected by fungi is completely manipulated. When fungi reproduce, these ants will find a leaf slightly higher than the ground, then bite the vein with their jaws and finally hang themselves directly. Spores grow and spread on ants' heads. Ants are also very picky about the location of death. Usually they are at a certain distance from the ground, neither high nor high.
The surrounding environment is also very suitable for the growth of fungi, which makes people sigh. Many people ask, are these fungi really that smart? In fact, how fungi control their hosts has always been a hot but difficult topic for scientists, but some research reports show that scientists may have found some clues. Most scientists believe that although the mechanism of how fungi control cicada hosts remains to be explained, there are clues that this control behavior may be related to some psychochemicals.
One of them is Pleurotus ostreatus, which you may not be familiar with, but you are familiar with plants containing this neurotoxin, especially friends who grew up in Yunnan. When they often eat green hands, there are naked mushrooms. This statement seems to only appear in movies, but it is true. Although there are some artistic exaggerations, I don't think it will happen here at present.
Because the viruses and parasitic fungi we find now are mild and have no strong ability to control animal consciousness. But art actually comes from real life, so some scenes in these sci-fi movies actually have certain scientific basis. In nature, especially in the insect world, there are usually hallucinogenic fungi infected and manipulated by fungi according to their own intentions, so we can't stop this insect from continuing to develop.
Why the zombie cicada without its belly can live forever and even mate, that's all for today.
Can you live after cocoon peeling?
Answer: Cut the cocoon and the silkworm will live. Cocoons are mainly used to protect silkworms, which can avoid the invasion of germs in the wild environment. If it is cultivated artificially, the environment itself will be cleaner, there will be no natural enemies, and the cocoon can be cut open. Cut it off and put it on cotton. Don't touch it. Usually, the purpose of cocoon cutting is to identify males and females and facilitate pairing hybridization.
If there is no external damage, the silkworm will not die immediately, but the constant temperature and humidity environment will be destroyed, which will affect the growth and development of the silkworm due to the drastic change of temperature and excessive water loss, and often fail to complete eclosion and eventually die.
Failure of silkworm pupation
I think malnutrition or premature cocoon entry leads to death and decay.
Black proves that the silkworm has rotted and turned black. There are many reasons, and it is not excluded that the nutritional supply of silkworms cannot keep up.
Maybe this silkworm has a weak innate antibody.
From this point of view, even if we work very hard to turn a cocoon into a butterfly, we may fail and fall short.
However, since it was born, it lived to fly, so dear, don't feel sorry for it, at least it is hanging on the road to realize its dream, which is also extremely glorious. I'm sorry for your loss, dear
I hope my answer can help you.