What is the role played by agriculture I silk production
Answers
Sericulture, or silk farming, is the cultivation of silkworms to produce silk. Although there are several commercial species of silkworms, Bombyx mori (the caterpillar of the domesticated silk moth) is the most widely used and intensively studied silkworm. Silk was believed to have first been produced in China as early as the Neolithic period. Sericulture has become an important cottage industry in countries such as Brazil, China, France, India, Italy, Japan, Korea, and Russia. Today, China and India are the two main producers, with more than 60% of the world's annual production.
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Silkworm larvae are fed with mulberry leaves, and, after the fourth moult, they climb a twig placed near them and spin their silken cocoons. The silk is a continuous filament comprising fibroin protein, secreted from two salivary glands in the head of each larva, and a gum called sericin, which cements the filaments. The sericin is removed by placing the cocoons in hot water, which frees the silk filaments and readies them for reeling. This is known as the degumming process.[8] The immersion in hot water also kills the silkworm pupa.
Single filaments are combined to form thread, which is drawn under tension through several guides and wound onto reels. The threads may be plied to form yarn. After drying, the raw silk is packed according to quality.
Stages of production Edit
The stages of production are as follows:
The silk moth lays 300 to 500 eggs.
The silk moth eggs hatch to form larvae or caterpillars, known as silkworms.
The larvae feed on mulberry leaves.
Having grown and moulted several times, the silkworm extrudes a silk fibre and forms a net to hold itself.
It swings itself from side to side in a figure '8' distributing the saliva that will form silk.
The silk solidifies when it contacts the air.
The silkworm spins approximately one mile of filament and completely encloses itself in a cocoon in about two or three days. The amount of usable quality silk in each cocoon is small. As a result, about 2500 silkworms are required to produce a pound of raw silk.[9]
The intact cocoons are boiled, killing the silkworm pupa
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