Silkworm moth is an insect, which originated in China and was domesticated indoors, so it is also called silkworm. Silkworm rearing and silk utilization is an important event in human life. It was recorded in China about 4,000 years ago, and at least 3,000 years ago, China began to raise silkworms artificially. In 55 1 year, two foreign monks brought cocoons to Europe. The moth body is of medium size, the male and female antennae are comb-toothed, and the male comb-toothed is slightly longer; The beak is degenerated, the lower lip must be short, there is no monocular, the body wings are grayish white, and the wing veins are grayish brown. When silkworms spin silk and form cocoons, their heads keep swinging, weaving silk into neat ∝-shaped circles. Move your position every time you weave more than 20 times (called a silk row), and then continue to spit and weave the silk row below. Weave one end first and then the other, so the cocoon of silkworm is always thick at both ends and thin in the middle. Every time a silkworm produces a cocoon, it needs to change its position 250 ~ 500 times to weave more than 60,000 splayed silk loops. The average length of each silk loop is 0.92cm, and the silk length of a cocoon can reach1500 ~ 3,000 m. The secretion in the silk gland is completely exhausted, and it becomes a moth.

Silkworm is a kind of abnormal insect, the most common one is silkworm, also called silkworm, which is one of the economic insects that cocoon on mulberry leaves. Silkworm originated in China, its development temperature is 7 ~ 40℃, and its suitable feeding temperature is 20 ~ 30℃.

Silkworm life experiences more than 50 days: silkworm eggs, ants, mature silkworms, cocoons and moths.

Silkworms just hatched from eggs are as black as ants. We call them ant silkworms. They are covered with fine hair, which is not obvious after about two days. The ant silkworm has an appetite about 40 minutes after hatching, and the feeding process is about to begin.

It takes two days and two nights for the fifth instar larvae to cocoon, and the longest silk used for cocoon can be drawn to 1.5km! The silkworm peeled its cocoon for the last time and became a pupa. About ten days later, it appeared in the form of a silkworm moth and came out of the cocoon. After cocoon emergence, the tail of the female moth emits odor to lure the male moth to mate, and the male moth dies after mating. It takes the female moth about one night to lay about 500 eggs, and then she will die slowly.

The development process of silkworm goes through four stages: fertilized egg, larva, pupa and adult, and there are obvious differences in morphological structure and living habits between larva and adult. This development process is called complete transformation. Chen Mingjiru's "The Temple of Yuan Gong (Yuan Keli) on the Day of Sima": "The ancients ate rice and sacrificed silkworms first."

Male silkworms spin more silk.

The chubby silkworm baby is really cute. This is not only white and clean, but more importantly, it can turn mulberry leaves into white silk. Silkworms like to raise more male silkworms, because male silkworms produce more silk and consume less mulberry leaves than female silkworms. Why do male silkworms eat less but spin more silk? This should also start from the characteristics of silkworms. The adult life of male moths is shorter than that of female moths, and they usually die after mating with female moths. Female moths will produce a large number of eggs after mating. Both male and female moths don't eat or drink, and rely on substances accumulated in their bodies to maintain their lives. The substances accumulated in male moths are less, while those accumulated in female moths are more. Because the male moth dies after mating, while the female moth lays eggs for a long time to continue the race. Male silkworms need less substances for gonad development, unlike female silkworms, which need to store eggs in their bodies. Therefore, male silkworms can convert more substances into silk and spit them out to become cocoons.

Silkworm is the larva of silkworm moth and the main source of silk raw materials, which plays an important role in human economic life and cultural history. Originated in China, the staple food is mulberry leaves, which can also be supplemented by goose dishes. In southern Chinese mainland and Taiwan Province Province, silkworms are often called baby silkworms or mother silkworms.

The English name of silkworm is "silkworm" because it weaves cocoons with silk. Cocoon is made of continuous silk with a length of 300 ~ 900 meters (1000 ~ 3000 feet).

Silkworms have a big appetite. They eat mulberry leaves day and night, so they grow very fast, commonly known as eating whales. There are suction cups on the feet, which can be sucked on rough objects. When their heads turn black, it means they are going to shed their skin. After molting for four times, their bodies will turn pale yellow and their skin will become tighter, which indicates that they will wrap themselves in cocoons and turn into pupae in cocoons.

If the pupa is transformed into an adult, the cocoon will naturally dissolve and drill out, and the hole in the cocoon will shorten the silk thread, so it is necessary to put the cocoon in boiling water and kill it before the hole is broken, so that the cocoon is easy to disintegrate. Silkworms and pupae are edible and have therapeutic effects.

Adult moths cannot fly. They are also called "silkworm moths" and are only used to lay eggs and reproduce offspring. Generally speaking, female silkworm moths are fatter than male silkworm moths. Because of its long history and important economic value, silkworm genes have become an important research object of modern science.