Silkworm is a deformed insect, the most common one is silkworm, also called silkworm, which is one of the economic insects that spin silk and cocoon on mulberry leaves. Silkworm originated in China, its development temperature is 7 ~ 40℃, and its suitable feeding temperature is 20 ~ 30℃. Silkworm babies feed on mulberry leaves After eating mulberry leaves continuously, the body turned white and began to peel after a period of time.
When peeling for a day or so, if you can't eat or move like sleeping, it's called "dormancy". Once skinned, it is the second instar larva. If you peel it once, it will increase by one year. Larvae will be skinned four times and become fifth instar larvae. After eating mulberry leaves for 8 days, they will become mature silkworms and start spinning and cocooning.
Expand the value of silkworm data
1. The economic value of silkworm lies in silk. Silk is one of the main textile raw materials. China was the first country to use silk. In ancient history, there was a legend that Fuxi "transformed silkworms" and Leizu "taught people to raise silkworms". It is also said that the imperial concubine Xiling of the Yellow Emperor was the first person to raise silkworms.
Archaeology in the Neolithic Age shows that before 2750 BC, the ancestors of Qianshanyang in Xing Wu, Zhejiang Province had woven silk sheets, ribbons and silk threads with silk.
In the 3rd century BC/KLOC-0, names such as mulberry, silkworm, silk and silk were found in Oracle Bone Inscriptions. Silk, together with hemp, ramie and later cotton, is the main clothing raw material for China people, and sericulture has become an important part of China's agricultural structure.
In the eyes of the ancients, silkworms were sacred animals. Spinning silk into cocoons and then turning it into flying souls is a beautiful and complete life cycle, which endows silk with mysterious and noble humanistic color and strong philosophical meaning. Silk culture has a long history of thousands of years. The ancient silk civilization is the treasure of the Chinese nation and China's great contribution to the world.
3. There are many silk fabrics unearthed in the Warring States period in China, including Luo, Ling, Wan, Yarn, Crepe, Qi, Brocade, Embroidery and other products, and their patterns and colors are amazing.
During the Song and Yuan Dynasties (960 ~ 1368), silk production and silk weaving reached another peak, and the annual output of silk in the Song Dynasty reached 3.4 million. The rulers attached equal importance to silk industry and agriculture. There is often a record of "farming and mulberry simultaneously" in China ancient books.
Baidu encyclopedia-silkworm
Baidu encyclopedia-silkworm