SERICULTURE

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Class 7 Animal fibres

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DAY – 2 :

DAY – 2 TOPICS TO BE COVERED STEPS INVOLVED IN SERICULTURE PROCESSING OF SILK

Let’s recapitulate what we discussed in previous class:

Let’s recapitulate what we discussed in previous class

Species of silkworm:

Species of silkworm Mulberry silkworm Tasar silkworm Muga silkworm Eri silkworm Oak silkworm Giant silkworm

Sericulture:

Sericulture The cultivation of silkworm for the purpose of producing silk is called sericulture.

Slide5:

Rearing of silkworms

STEPS INVOLVED IN SERICULTURE:

STEPS INVOLVED IN SERICULTURE The healthiest moth are selected for breeding. The female moth lay many eggs at a time. The eggs are kept in a hygienic and controlled environment. They are warmed to suitable temperature for larvae to hatch. Once hatched, the larvae are kept in bamboo trays and fed large quantities of chopped mulberry leaves.

....:

.... It takes about 21 and 25 days after hatching the full grown caterpillar is 7.5cm in length. After 25-30 days, racks of twigs are placed in the bamboo trays for the worms to attach and spin cocoons. Silk is obtained from the undamaged cocoon.

Processing Silk Obtained from Cocoons :

Processing Silk Obtained from Cocoons Cocoons are collected and left under the sun, or boiled for separating out the silk fibres . After that reeling of silk is done, the process of unwinding silk from a cocoon. Then, the spinning of silk fibres into threads is done. The silk threads obtained are woven into desired clothes.

Slide9:

Processing of silk

Health hazards in sericulture :

Health hazards in sericulture Burning of skin, blisters and open wound injuries. Backache and eye problems. Respiratory problems such as asthma and bronchitis. Hearing problems due to noisy machines.

ASSIGNMENT:

ASSIGNMENT INTEXT QUESTIONS Name the Following Q 1-5 Pg No. 32 (In C.W. Notebook) True or False Q1-5 Pg No. 35 (In C.W. Notebook ) Read the chapter till page no. 32

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