short notes on sericulture
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Bombyx mori is the most widely used and intensively studied silkworm.
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(1) Silk fibre is obtained from Bombyx mori or silk moth.
(2) There are four stages in the life cycle of silk moth, viz. eggs, larva, pupa and adult.
(3) The thousands of eggs laid by female of silk moth are incubated artificially. By doing so the natural period of incubation is lessened.
(4) The larvae hatching out of the eggs are fed with mulberry leaves in the initial phase. Later they are kept on bigger mulberry trees. The larvae are voracious feeders and they grow rapidly by eating these leaves.
(5) After 3 to 4 weeks the larva starts producing secretions from its salivary glands. Larvae spin this thread around themselves to form a cocoon. The cocoon may be spherical in shape.
(6) Before the pupa turns into an adult, all the cocoons are transferred into boiling water. This is done 10 days before the cocoon opens and the adult moth can fly out. Because of boiling water, the pupa dies in the cocoon and silk fibres become loose.
(7) These fibres are unwound, processed and reeled. Various kinds of fabric is woven from silk threads.