Why do silkworms not form cocoons halfway through?

1.Trace pesticide poisoning Silkworms are exposed to trace pesticides in feeding, which paralyzes the central nervous system of silkworms, causing silkworms to spin silk function to be impaired and cocoon silkworms do not form cocoons. In particular, in the second half of the fourth instar, those who are exposed to pesticides do not form cocoons.

2.Silkworm disease is mainly caused by pus, softening and microparticle disease. The onset of infection usually occurs around the time of the infection. Some pathogenic microorganisms directly invade the silk gland, seriously damaging the secretion function of the silk gland. or pathogenic microorganisms.

3.Physiological effects Due to physiological influences such as excessive hypertrophy of the silk glands, the silkworms do not form cocoons. The current multifilament varieties are relatively easy to produce non-cocoon silkworms.

4.Undesirable environment One is due to the undesirable environment in rearing.

Silkworms may spin when they are frightened twice or more. It is also possible that if you are frightened, you will dry the silk soil and not form a cocoon, so you will die directly. It is also possible that he will not even vomit at all, and just wait for death. So you can't touch it when it's cocooning, and you can't move it.

Silkworms are still spinning silk when they are frightened twice or more. It is also possible to dry the silk soil without forming cocoons when frightened. But I didn't even vomit, I waited. So don't touch or move while cocooning.

Why does the cocoon connect the cocoon to half of the poop and red water, this silkworm gets sick before it is nurtured, so that the cocoon will be like this!

Why do half of silkworm cocoons have feces and red water? This silkworm is already sick before it gives birth, so it will be like this when it receives the cocoon!

Why is the silkworm cocoon pooping and red water halfway through, this silkworm is sick before the silkworm is formed, so the silkworm cocoon will be like that!

What is the reason why some silkworms do not form cocoons, and then I will introduce it to you.

1. Pesticide poisoning.

In the process of feeding silkworms, a small amount of pesticides will cause the silkworm spinning function to cause disorders, resulting in the phenomenon of not forming cocoons.

2. Variety. Varieties with a large amount of filaments or varieties with poor pesticide resistance will not be easy to cocoon.

3. Physiological factors.

Physiological factors such as excessive hypertrophy of the silk glands will cause non-cocooning.

4. Surrounding environment.

The feeding environment is too hot, the leaf quality is too tender, and the temperature in the cocoon is too low, which may cause the phenomenon of non-cocooning.

5. Caused by disease.

When silkworms have diseases such as pus, softening and microparticle disease, pathogenic microorganisms will invade the silkworm body, affecting the development of silkworms and the formation of silkworm cocoons.

Summary. Silkworm cocoons do not come out of the shell for a certain period of time because of environmental problems.

Silkworm cocoons do not come out of the shell for a certain period of time because of environmental problems.

It takes about 12-15 days for silkworms to come out after cocooning. Silkworm life on more than 40 days, from the shell to the cocoon about more than 20 days, after the cocoon after 4 days of laughter, it will become a pupae, silkworm cocoon will be molted in the cocoon after the pupation, after 12 15 days out of the cocoon out of the hole to raise the cover, mating and laying eggs after a week of natural death.

After the silkworm cocoon is completed, it will molt and pupate in the cocoon, and after 12 to 15 days, it will break out of the cocoon, and die naturally after a week of mating and laying eggs.

Silkworm babies live on mulberry leaves, and after constantly eating mulberry leaves, their bodies slowly turn white, and after a period of time, they begin to shed their skin. When peeling, you don't eat or move for about a day, like sleep, which is called dormancy. After a peel, it is a second-instar larvae.

Even if it sheds its skin once, it will increase its age by one year, and it will have to shed its skin four times in total, and it will only begin to spin silk and form cocoons when it becomes a fifth-instar larva. It takes two days and two nights for the five-year-old larvae to form a cocoon, and the silk Shenzhou that makes the cocoon can be pumped up to a kilometer long! The silkworm sheds its skin for the last time in the cocoon and becomes a pupae.

About 12 15 days, it feathers into a silkworm moth and emerges from a cocoon.

Yes, it is called a double palace cocoon, and there are two or more silkworm pupae in a cocoon; When the silkworm has a large amount of silkworm spinning, the body is greatly reduced, the cephalothorax swing speed slows down, and there is no certain rhythm, the silkworm begins to appear messy, forming a loose and soft cocoon silk layer, called the pupal lining.

After about 4 days after the silkworm has formed a cocoon, it will become a pupa. The body shape of the silkworm key is like a spinning body, which is divided into three body segments: head, chest and abdomen. The head is small, with compound eyes and antennae; thorax with thoraco-footed and wings; The bulging abdomen has 9 segments.

When the silkworm just pupates, the body color is pale yellow, the pupal body is tender and soft, and gradually it will become yellow, yellowish brown or brown, and the pupal skin is also hard. After about 12 to 15 days, when the pupal body begins to soften again, and the pupal skin is a little wrinkled and earthy brown, it will become a moth.

Hello, it will die, the silkworm without cocooning will die because it has lost the barrier to protect itself. There are two main reasons for the failure of silkworm cocooning: silkworms cry in feeding, contact with trace pesticides, paralyze the central nervous system of silkworms, cause silkworm spinning function disorders and Jianlingye does not form cocoons; Infected with silkworm diseases such as pus, softening and microparticle disease.

Silkworm (scientific name: bombyxmori) is a lepidopteran insect, the main raw material of silk**, which occupies an important position in human economic life and cultural history. Native to China, South China and Taiwan, commonly known as silkworm babies or mothers.

The silkworm is called "silkworm" (meaning "silkworm") because it uses silk to weave cocoons. The cocoon is woven from a 300-900 meter long silk of Wang Jing. Nowadays, China's cocoon silk production and export volume account for more than 70% of the world's total, and has become a major cocoon silk country that can dominate the world's cocoon silk trend.