Why don t some silkworms spin silk? Why do some silkworms not spin silk

1.Lesion causes: microparticles and pus can directly destroy the silk glands of silkworms, resulting in the occurrence of non-silkworms.

2.Trace poisoning: Mulberry leaves have trace pesticide residues, and there will be no acute poisoning after encroachment, but paralysis or destruction of the central nervous system of silkworms, resulting in non-spitting silkworms.

In addition to trace amounts of pesticides, some toxic gases, such as coal gas, chemical plant exhaust gases and tobacco leaves, can also cause silkworms.

3.Environmental factors: abnormal temperature during the silkworm period, such as a sudden drop in temperature or sudden high temperature, will cause the development of silkworm silk glands abnormally, resulting in silkworms with less silk or even no silk.

4.Physical damage: The operation of the silk gland is too rough, which can easily cause the silk gland to rupture.

5.Others: The silkworm spit mouth is blocked, resulting in no silk spit or slow silking.

Therefore, in order to reduce the occurrence of non-cocoon silkworms during the sericulture period, attention should be paid to: disinfection and disease prevention, prevention of pesticide or adverse gas poisoning, strengthening the management of silkworm period and the management of silkworm operation.

Some silkworms do not spin silk, mainly due to pathological causes. For example, pus, stiffness, bacterial disease, etc., infection before the silkworm tuft, it will destroy the secretion function of the silk gland, or produce a large number of toxic metabolites in the silkworm body, so that the silkworm's nerves are paralyzed, and the silkworm can not spin silk and form cocoons.

1. Silkworms have been infected with certain diseases such as midgut pus, bacterial diseases or microparticle diseases;

2. Silkworms have slight pesticide poisoning or fluoride poisoning;

3. The overripe silkworm is on the silkworm, the silkworm has spit out some silk on the silkworm seat, and at this time catch it on the silkworm, and no longer continue to spin the silk because of the alarm;

4. Raw silkworms, or cooked silkworms are too dense, because silkworms crawl in the silkworms for a long time, resulting in excessive physical exertion and not spinning silk;

5. High temperature, high humidity or low temperature will also cause silkworms not to spin silk.

Silkworms do not spin silk may be because the mulberry leaves are not clean, feeding mulberry leaves with pesticides, environmental factors The temperature is too high and too low will also affect the silk, and there is damage to the silk gland during the management process.

1.Zombie silkworms and pus silkworms appear before the upper cluster, resulting in the inability to spin silk normally.

2.Improper control of temperature and humidity in the silkworm room causes abnormalities in the silk glands of silkworms.

3.Mulberry leaves are infected with pesticides, and silkworms are poisoned after feeding.

The reason why the silkworm does not spin silk: the silkworm is overripe, the silkworm has spit out some silk on the silkworm seat, and at this time it is grabbed on the silk, and it is no longer continued to spin silk because of the alarm; Raw silkworms, or cooked silkworms are too dense, because silkworms crawl in the silkworms for a long time, resulting in excessive physical exertion and not spinning, high temperature and stuffiness, high humidity or low temperature will also cause silkworms not to spin silk.

Mature silkworms have strong backlight, large amount of feces and urine, and before spinning silk and cocooning after silk, it is necessary to keep the light in the cocoon room slightly dark and even, so as to avoid over-density of mature silkworms;

The next day after the cocoon, when most of the ripe silkworms have been positioned in the cocoon, a small number of silkworms that have not found a place and are still crawling on the cocoon should be caught and put on the cocoon, and the doors and windows should be opened, ventilation and moisture discharge, the temperature of the protection in the cocoon is about 25, and the difference between dry and wet is 3 4. In case of low temperature, it should be properly heated and dehumidified.

There are generally the following reasons why ripe silkworms do not spin silk:

1. Silkworms have been infected with certain diseases such as midgut pus, bacterial diseases or microparticle diseases;

2. Silkworms have slight pesticide poisoning or fluoride poisoning; Aroma of toilet water, harmful odors such as gas oil, kerosene, diesel, etc.;

3. The overripe silkworm is on the silkworm, the silkworm has spit out some silk on the silkworm seat, and at this time catch it on the silkworm, and no longer continue to spin the silk because of the alarm;

4. Raw silkworms, or cooked silkworms are too dense, because silkworms crawl in the silkworms for a long time, resulting in excessive physical exertion and not spinning silk;

5. High temperature and low temperature will also cause silkworms not to spin silk.

The process of cocooning a baby silkworm.

1. The ripe silkworm first spits out the silk, then bonds it to the chimner, and then spins the silk to connect the surrounding supports to gradually form 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 making cocoon clothes, continue to spit out messy silk circles, thicken the inner layer of cocoon nets, bend the silk spinning method, spin silk knots to make cocoon clothes, and begin to appear cocoon-shaped outlines, the silk of cocoon clothes is slender and brittle, irregularly arranged, and the sericin content is also more.

3. The silkworm will spit out the silk into a neat "8" shaped silk circle, and move the body every time it weaves more than 20 silk circles (called a silk column), and then continue to spin the silk and weave the silk row below, and then weave the other end after weaving one end.

4. Finally, when the body of the silkworm baby is greatly reduced due to a large amount of silk, the cephalothorax swing speed will slow down, resulting in the loss of rhythm, and the silkworm will begin to look messy, forming a loose and soft cocoon silk layer, which is called a pupal lining.

Silk spinning is a physiological function of silkworms, which forms cocoons through silk spinning, and then undergoes physiological transformation, so it belongs to one of its habits.

This is because silkworms use a large number of mulberry leaves in the larval stage, and mulberry leaves themselves contain various amino acids. When there are too many amino acids in the silkworm's body, it can lead to poisoning, so silkworm toast is a way to detoxify itself.