When is a silkworm at what age does it start spinning? When did the silkworm start spinning

Answer: Silkworms will spin silk at the larval stage, and the first stage of silkworms is the feeding period, which is the first 4-5 days, and will mainly eat silkworm leaves. The second stage is the silkworm spinning period, which is about 5-6 days, and the silkworms at this stage will concentrate on silkworming.

When the silkworm becomes a pupae, it will not spin silk, and it will be in a state of pupae throughout the winter, and it will turn from a pupa into a butterfly when the temperature rises in the spring of the following year. <>

Silkworms start from hatching. Generally, it needs to grow to about 25 days to start a large number of silkworms, silkworms after a peeling, that is, the second instar larvae, after each peeling will increase one instar, a total of four times to shed the skin, become a fifth-instar insect before starting to spin silk cocoon.

Hello dear, silkworm babies usually start to spin silk when they are more than 20 days old. When Tusi Hongwei walks, he will become quiet, he will no longer eat mulberry leaves, his body will begin to shine, his head will keep swinging, and the muscles of his head will expand and contract back and forth, and then he will begin to look for a suitable position or cocoon. Usually it takes two days and two nights to spin the silk and form a cocoon, during which time do not disturb it, otherwise it will be frightened, stop spinning, and may even die.

Silkworms spin silk at the larval stage.

That is, in more than 20 days, it usually takes two days and two nights to spin silk and form cocoons, and when you spin silk, you will become quiet, and you will no longer eat mulberry leaves, your body will begin to shine, your head will keep swinging, and the muscles of your head will expand and contract back and forth, and then you will begin to look for a proper position to form a cocoon.

Silkworm spinning is generally in the larval stage, silkworm spinning must put something in the silkworm box that can be supported, this is the only lack of help silkworm cocoon, but also to provide it with a suitable environment.

Silkworms usually spit out the silk first, and then connect the silk to the surrounding area or mulberry leaves to form a cocoon support. At this time, it is necessary to pay attention to the stupidity of the stove mountain, and there must be no movement to disturb the silkworms, and the silkworms will stop forming cocoons if they are disturbed when spinning silk.

Precautions for sericulture

Silkworm is a creature that is very afraid of cold, so we generally hear spring silkworms, and there is also a famous poem that only mentions spring silkworms, which is "spring silkworms to the end of the dead silk, wax torch into ashes and tears begin to dry." ”

Therefore, when raising silkworms, we should pay attention to the temperature of breeding, usually in April and May of each year is the best time to raise silkworms, the temperature at this time is basically about 20 to 25 degrees, we do not need to spend a lot of effort to adjust the temperature of the breeding room, so later through the adjustment of the temperature, there are also slowly other seasons of silkworm raising.

When raising silkworms, it is necessary to pay attention to the mulberry leaves should be fresh, at most, the mulberry leaves that have been placed at home overnight can also be used to feed the silkworms, but the mulberry leaves are not fresh for a long time, and the silkworms will have diarrhea or will not eat at all after processing.

The second thing to pay attention to is that the mulberry leaves must be cleaned, there can be no dust, and at the same time can not be given to the silkworm for the dew or after the cleaning is not dry mulberry leaves, because the silkworm will eat diarrhea and then die with it, and finally the mulberry leaves that have been sprayed in agriculture for a short time can not be picked back to feed the silkworms, and the silkworms are particularly sensitive to toxins.

When the mulberry tree germinates in spring, it hatches into larvae, and the larvae feed on mulberry and grow, and after 4 days of sleep, they molt and begin to form cocoons in 25 days. Two days later, the spinning was finished. The process of transforming a silkworm into a dish is only a short month, and its life is only one month.

The cocooning mature silkworm first spits out the large row of 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 a few soft and messy layers of cocoon silk to serve as a support for the cocoon.

After the silkworm knots the cocoon net, continue to spit out messy silk circles, 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, and the arrangement is extremely irregular, after the cocoon is formed, the cocoon cavity gradually becomes smaller, and the front and back ends of the silkworm body are bent to the back.