Why do silkworms wrap their companions when they form cocoons?

The silkworm cocoon is to wrap itself in, and it is by chance that it wraps its companions.

Cocooning can be divided into four processes:

1. The mature silkworm first spits out the silk, binds it to the cocoon, and then spins the silk to connect the surrounding branches to form a cocoon support, that is, a cocoon net. The cocoon net does not have a cocoon shape, but is just some soft and messy cocoon silk layer to serve as a support for the cocoon;

2. After the silkworm knots make the cocoon net, continue to spit out the messy silk circle, thicken the inner layer of the cocoon net, and then spin the silk in an S-shaped way, and the outline of the cocoon begins to appear, which is called the cocoon coat. The silk fibers of the cocoon are thin and brittle, the arrangement is extremely irregular, and the sericin content is also large;

3. After the cocoon is formed, the cocoon cavity gradually becomes smaller, the front and rear ends of the silkworm body are bent to the back to form a "C" shape, the silkworm continues to spit out the cocoon silk, and the silking method changes from the S-shape to the shape, which begins the process of forming the cocoon layer;

4. When the silkworm has a large amount of silkworm spinning and its body is greatly reduced, the cephalothorax swing speed slows down, and there is no certain rhythm, and the silkworm begins to appear messy, forming a loose and soft cocoon silk layer, which is called a pupal lining.

Sometimes silkworms are very bad and find that the cocoon knots are too large and too wide. So, I wrapped my companion in. The cocoon is too wide for it to pupate. If the silkworm wrapped in is not the same age, it will definitely die. If so, it is possible to pupate. One peeling is one year old, and four peeling sessions are required.

Two silkworm babies form a cocoon together, which is more common, we call it a double palace cocoon, and two moths can come out after turning into moths. The surface of this cocoon is rougher than that of ordinary cocoons, and the cocoon type is also larger, which is easy to distinguish. Or maybe twins!!

Don't worry, it's okay, you must have used leaves that are not mulberry leaves, you should use lettuce leaves or feed to become, silkworms eat leaves to make themselves white, don't worry about the rest, don't worry about it The silkworm that was wrapped in it should also form a cocoon, don't worry. Some silkworms are two kinds of silkworms cocooning together, there are many such silkworms, and the silk quilt is made of cocoons woven together by two silkworms, don't worry, I've seen it on TV.

There are 2 silkworms spinning silk together. Silk is used for this kind of cocoon.

The elevation of the silkworm head indicates that the silkworm has begun to molt, and the outer skin of the silkworm is about to begin to molt;

Before the cocoon, the feces pulled by the silkworm baby will be unusually large (every time the skin is removed, the will be larger, but this time it is not taken off to let the skin), and the leaf particles in the feces can be seen, the leaves are almost not digested, and the body is transparent, which are the characteristics of the cocoon.

Before the cocoon is about to begin, there is also a procedure for the Yuling Bureau - drainage, the silkworm only poops, and this time it is urine, but sometimes the urine and stool will come out together, the stool is yellowish-white, and the cocoon should be placed in a place with an angle, not in a flat place.

There will be a silkworm chrysalis inside, you don't need to cut it, and when it reaches a certain time, it will become a silkworm moth by itself, and it will open the cocoon by itself, and anyone who has raised it or has seen the silkworm transformation process knows that you can also cut the cocoon, and then the chrysalis will move when it is taken out, which is very fun, but be careful when cutting it, sometimes it will hurt the chrysalis, but when I used to raise it, I followed the laws of nature to let it become a silkworm moth by itself.

The silkworm cocoon surrounds itself entirely to create a safe environment for metamorphosis, and eventually it is necessary to bite the cocoon through and reproduce offspring. Mulberry silkworm originated in China, its development temperature is 7 40, suitable for 20 30. Silkworm babies live on mulberry leaves, and their bodies turn white after eating mulberry leaves, and they begin to peel off after a period of time.

The silkworm cocoon surrounds itself entirely to create a safe environment for metamorphosis, and eventually it is necessary to bite the cocoon through and reproduce offspring. Mulberry silkworm originated in China, its development temperature is 7 40, suitable for 20 30. Silkworm babies live on mulberry leaves, and their bodies turn white after eating mulberry leaves, and they begin to peel off after a period of time.

When the skin is peeled, you don't eat or move for about a day, as if you were sleeping, which is called "dormancy". After a single peeling, it is a second-instar larvae. Even if the skin is shed once, it will increase by one year, and the larvae will shed their skin four times to become a fifth-instar larva, and then eat mulberry leaves for 8 days to become a mature silkworm and begin to spin silk and form cocoons.