Steps for the production of silk are given below in a jumbled order. Arrange them in their proper sequence.
(a) Eggs are warmed to a suitable temperature for the larvae to hatch from eggs.
(b) Fibers are taken out from the cocoon.
(c) After 25 to 30 days, the caterpillars stop eating and start spinning cocoons.
(d) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves.
(e) Female silk moths lay eggs.
(f) Cocoons are kept under the sun or boiled in water.
Steps for the production of silk are given below in a jumbled order. Arrange them in their proper sequence.
(a) Eggs are warmed to a suitable temperature for the larvae to hatch from eggs.
(b) Fibers are taken out from the cocoon.
(c) After 25 to 30 days, the caterpillars stop eating and start spinning cocoons.
(d) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves.
(e) Female silk moths lay eggs.
(f) Cocoons are kept under the sun or boiled in water.
Sericulture:
- Sericulture is the process of rearing silkworms. The first step is a lying egg of a moth on a paperboard, approximately 300-500 eggs are laid at a time.
- Eggs are incubated under suitable environmental conditions until they are hatched into larvae.
- The hatched larvae were placed on the feeding bed with chopped mulberry leaves on rearing day. This process is called brushing.
- Under the suitable condition, the larvae are allowed to develop into the mature stage, at which they stop eating and begin the secretion with salivary glands present in their head.
- The saliva helps to produce cocoon to silk.
- Inside the cocoon, the larvae metamorphosis into a mature stage called pupae.
- Then it is treated with boiled water and sunlight to dry this process is called stifling.
- This leads to the killing of pupae and facilitates the separation of filaments individually by dissolving the sericin adhesion between the filaments.
- The process is known as degumming.
- Treatment with boiling water is followed by drying in the sun which reduces the adhesion with the filaments.
- The raw silk is extracted and rolled into the yarn.
Correct sequence of events in sericulture:
(e) Female silk moths lay eggs.
(a) Eggs are warmed to a suitable temperature for the larvae to hatch from eggs.
(d) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves.
(c) After 25 to 30 days, the caterpillars stop eating and start spinning cocoons.
(f) Cocoons are kept under the sun or boiled in water.
(b) Fibers are taken out from the cocoon
Sericulture:
- Sericulture is the process of rearing silkworms. The first step is a lying egg of a moth on a paperboard, approximately 300-500 eggs are laid at a time.
- Eggs are incubated under suitable environmental conditions until they are hatched into larvae.
- The hatched larvae were placed on the feeding bed with chopped mulberry leaves on rearing day. This process is called brushing.
- Under the suitable condition, the larvae are allowed to develop into the mature stage, at which they stop eating and begin the secretion with salivary glands present in their head.
- The saliva helps to produce cocoon to silk.
- Inside the cocoon, the larvae metamorphosis into a mature stage called pupae.
- Then it is treated with boiled water and sunlight to dry this process is called stifling.
- This leads to the killing of pupae and facilitates the separation of filaments individually by dissolving the sericin adhesion between the filaments.
- The process is known as degumming.
- Treatment with boiling water is followed by drying in the sun which reduces the adhesion with the filaments.
- The raw silk is extracted and rolled into the yarn.
Correct sequence of events in sericulture:
(e) Female silk moths lay eggs.
(a) Eggs are warmed to a suitable temperature for the larvae to hatch from eggs.
(d) The larvae/caterpillars or silkworms are kept in clean trays along with freshly chopped mulberry leaves.
(c) After 25 to 30 days, the caterpillars stop eating and start spinning cocoons.
(f) Cocoons are kept under the sun or boiled in water.
(b) Fibers are taken out from the cocoon
