By team : Agro aggregates
A material which is composed of thin and continuous strands is known as fiber. A fiber can be of two types: natural fiber and synthetic fiber. The fibers which are obtained from plants and animals are known as natural fibers whereas synthetic fibers are man-made fibers. Examples of natural fibers are cotton and silk whereas examples of synthetic fibers are: nylon, polyester, etc. Silk is a type of natural fiber or animal fiber. Silkworm is responsible for spinning of silk and it is reared to obtain silk
The rearing of silkworms for the production of raw silk is known as sericulture. Silk is the protein secreted by the larvae of certain Lepidopteran moths. It is fibrous in nature, and widely used for the manufacture of art clothes. The silk is derived from silk moths mainly belonging to Bombycidae and Saturnidae families of lepidoptera.
Sericulture is the art of rearing silk worms under artificial or domesticated conditions and extraction of the silk fiber from their cocoon. The moths belonging to two major families, Bombycidae and Saturnidae of Lepidoptera group of insects produce commercial silk in India Based on the quality and lusture of the silk fibers 4 types of silk are produced by die different forms of silk secreting moths. The main species of silk secreting moths are Bombyx sp. Attacus sp. and Anthracea sps..
Silk worm and cocoon
The life cycle of silkworm
The life cycle of silk moth starts when a female silk moth lays eggs. The caterpillar or larvae are hatched from the eggs of the silk moth. The silkworms feed on mulberry leaves and give rise to pupa. In pupa stage, a weave is netted around by the silkworm to hold itself. After that it swings its head, spinning a fiber made of a protein and becomes a silk fiber. Several caterpillars form a protective layer around pupa and this covering is known as the cocoon. The silk thread (yarn) is obtained from the silk moth’s cocoon. The life cycle of silkworm is explained below in details.
Stage 1: Egg
An egg is the first stage of the life cycle of silkworm. The egg is laid by a female moth which is mostly the size of small dots. A female moth lays more than 350 eggs at a time. In the springtime, the eggs hatch due to the warmth in the air. This procedure happens once in every year.
Stage 2: Silkworm
A hairy silkworm arises after the eggs crack. In this stage of silkworms, the growth happens. they feed on mulberry leaves and consume a large amount of these leaves for around 30 days before going to the next stage.
Stage 3: Cocoon
In this stage, silkworms spin a protective cocoon around itself. It is the size of a small cotton ball and is made of a single thread of silk.
Stage 4: Pupa
Pupa stage is a motionless stage. In this stage, people kill the pupa by plunging the cocoon into boiling water and unwind the silk thread.
Stage 5: Moth
In this stage, the pupa changes into an adult moth. The female moth lays eggs after mating and thus the life cycle of silkworm begins again.
Processing of silk
Extracting silk from the cocoon is known as the processing of silk. Silk is separated from cocoon by exposing it to sunlight. After that reeling of silk is done, the process of unwinding silk from a cocoon. Silk thread is then bleached. Silk fiber is then spun into silk threads.
· Skill development among sericulture women on improved silkworm rearing and mulberry cultivation technologies
· Promote sericulture based self employment among rural sericulture women for additional income.
· Create awareness about the available resources/inputs through different government departments/institutions for effective utilization and increased output.
· Finally to improve the yields of cocoons and income of the farmers in sericulture.
By team : agro aggregates
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