The silkworm girl has been cocooning for many days, and after the silkworm has formed a cocoon, how

The body shape of the silkworm chrysalis resembles a spindle, divided into three body segments: head, thorax and abdomen. The head is small, with compound eyes and antennae; thorax with thoraco-footed and wings; The bulging abdomen has 9 segments. Professionals are able to distinguish males and females from the lines and brown dots on the abdomen of silkworm pupa.

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

Mulberry silkworms (silkworms) are insects that were domesticated by ancient wild silkworms that were moved into the room and fed on mulberry leaves. The silkworm eats leaves grow and develop to the mature silkworm and cluster cocoons, which have their own regularity in the whole growth and development process. The silkworm and the external environment are a unified and inseparable whole.

The growth and development of silkworms are directly related to mulberry leaves, temperature, humidity, air and other environmental conditions. Therefore, understanding the growth and development of silkworms and the relationship between silkworms and environmental conditions is helpful to flexibly master the sericulture technology, create an environment suitable for the growth and development of silkworms, and obtain a bumper harvest of silkworms.

Out of the cocoon came the answer to the silkworm moth operation.

1.The silkworm formed a cocoon, and after passing through (c), the silkworm moth emerged from the cocoon.

a.Four or five days.

b.Seven or eight days.

2.The following statement is incorrect (a).

a.Every silkworm moth lays eggs.

b.Although silkworm moths have wings, they cannot fly.

c.After the silkworm moth emerges from the cocoon, it no longer eats mulberry leaves.

3.The following animals are insects (a).

a.Ant. b.Gecko.

c.Scorpions for many days.

If it's slow, it's estimated to be two months a month, and if it's fast, it's half a month.

Huji Town, Hongda Business Hotel, Huanghe 11th Road, Bohai 8th Road, Jin Juye, Shanghai when I came back.

Silkworms turn into moths about 10 to 20 days after forming cocoons.

The time it takes for a silkworm to become a moth after forming a cocoon varies slightly depending on the search results, but it is roughly between 10 and 20 days. According to 12 results, it takes about 10 days or so for a silkworm cocoon to turn into a moth.

After the silkworm has formed a cocoon, it will turn into a pupa after about 4 days, and the pupa will become a moth after about 15-20 days. Therefore, it can be concluded that how long after a silkworm becomes a moth after cocooning depends on the specific situation, but it generally takes 10 to 20 days.

After a certain period of time, the silkworm begins to spin silk and stop eating, and the silkworm farmer places it in a special container or a container to spin the silk and form a cocoon.

The silkworm cocoon has white, yellow, light green, flesh red and other colors, about 3 4 cm long, centimeter in diameter, white on the surface, irregular wrinkles, and attached silk, fluffy, the silk pattern on its inner wall is very regular, light and tough, not easy to tear, unfeathered cocoon, there is 1 yellow-brown silkworm pupae and light brown and shrunken silkworm skin taken off before pupation.

Precautions for silkworm breeding

1. Silkworms cannot die of hunger, and they will only die when they are sick.

2. Do not touch silkworms with your hands; The mulberry leaves fed to it should be washed, but the water must be dried after washing, and the silkworm should not be allowed to touch the water, otherwise it will die. Put it in a cardboard box, or a small sieve for sieving rice, and if you use a sieve, put some paper on the bottom of the sieve.

3. Silkworms are particularly sensitive to fragrance, and cannot use perfume or quiet, mosquito coils, air purifiers, scented cosmetics, etc. It is absolutely forbidden to use any type of insecticide!

4. When the silkworm has just hatched out of the egg, you should be especially careful with it, feed it with a relatively tender mulberry, and use a very soft brush to move it when changing mulberry leaves, and pay attention to the strength; Sometimes the mulberry leaves are too dry, and if you are not careful, you will leave the silkworms on the mulberry leaves to be discarded in the process of changing the mulberry.

When you are young, it is difficult to raise a little, but it is easier to do when you grow up. When it is about to form cocoons, take some wheat stalks and tie them into the shape of branches.

It takes about 14 days for silkworms to become moths after forming cocoons. When silkworms begin to shorten their bodies and stop eating, they begin to form cocoons. This process usually takes 2 to 3 days, and then the silkworm will stay in the cocoon for 10 to 12 days until it becomes a moth.

Cocoons are made by silkworms through the saliva they secrete, at which point the silkworm's salivary glands begin to enlarge and the secretions become thicker. When the salivary glands secrete the fluid of knowledge and defense exposed to the air, it becomes very hard, and at the same time, the silkworm wraps tightly around its body to form a cocoon.

In the cocoon, the silkworm goes through a developmental stage called the pupa stage. During this stage, their bodies undergo drastic changes and eventually become full-fledged moths. You may notice that the exterior of the cocoon looks fixed, but inside the cocoon, the silkworm is constantly changing.

After turning into a moth, the moth will wait in the cocoon for some time for the skin to dry out and its wings to expand. This process takes about a day to two days, and then it will start to gnaw through the cocoon and squeeze out, turning into a mature moth.

In conclusion, the process of turning a silkworm into a moth takes about 14 days from cocoon formation to maturity. In this process, the body of the silkworm will undergo great changes, and in the cocoon, the burning match will go through a stage of development of adult form, and finally complete the transformation process from silkworm to moth. <>

It takes about 10 days for a cocoon to turn into a moth. In the process of change, the silkworm chrysalis will always stay in the cocoon and do not come out, do not open the cocoon at this stage, otherwise it will seriously affect the development of the silkworm pupae.

Early stage: After two days of labor, the silkworm baby made its nest, and finally spit out some more around the mold reed, so as to ensure that the belt can be fixed, so that it can not be disturbed by the outside world and hatch quietly.

Medium-stage: The baby silkworm begins to gradually turn into a pupal after a molt in the cocoon, and the shell of the pupae is relatively hard, generally brown-colored.

Late stage: The baby silkworm that has become a chrysalis is about to complete the last molt, and when the cocoon is drilled, it will generally spit out a large amount of liquid and slowly prepare the cocoon, starting with the first to drill out, and finally drilling out successfully into a moth.