I BLPI-003

No. of Printed Pages : 8

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CERTIFICATE IN SERICULTURE (CIS) Term-End Examination J

December, 2015 BLPI-003 : SILKWORM REARING Maximum Marks : 50

Time : 2 hours Note : 1.

Answer any two questions out of three.

(a) Answer the following in one sentence 15x1=15 each : How do you identify the female (i) silkworm pupa ? (ii) What is diapause ? (iii) Classify the silkworm based on moultnism. (iv) Name five mulberry bivoltine silkworm breeds. (v) What is Tetramoulters ? (vi) Explain about different life stages of silkworm. (vii) What is hygiene ? (viii) Why should we keep the rearing house away from thickly populated areas and livestock ? (ix) Name one commonly used disinfectants. (x) What is the percentage of the silk produced in India from the class-breed ?

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(xi) What is moulting ? (xii) What is the floor area required to rear 100 Dfls of silkworm in shoot rearing ? (xiii) What is Incubation ? (xiv) Why non-mulberry silkworm rearing is done outdoors ? (xv) How many crops are taken in Muga culture ? (b) Write short notes on any five in 3 - 4 sentences each : 5x2=10 (i) Process of sheet egg brushing. (ii) List out symptoms of under moult and out-of-moult larvae. (iii) Suitable location for CRC. (iv) Advantages of shoot rearing. (v) Process of brushing Tasar silkworm larvae. (vi) Different methods of late age rearing in Eri. (vii) Important machines used in mulberry silkworm rearing.

2.

(a) Fill in the blanks : 15x1=15 (i) Blue egg stage is noticed on the day of incubation. (ii) Bearing of young age silkworm is called rearing. (iii) Piling up of rearing trays during chawki rearing is called rearing. (iv) The shoot rearing is labour consuming method of late age rearing.

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(v) (vi) (vii)

(viii) (ix) (x) (xi) (xii)

(xiii)

The appetite of the larva at the time of pre-moulting stage. Ideal leaf moisture content for chawki %. rearing is Scientific name of silkworm is Antheraea assama. Antheraea proylei is a hybrid of A pernyi and Jobarai is a method of Ideal capacity of a rotary mountage larvae. is Expenses incurred in production of mulberry is called as Shell ratio percentage in multi X bi-hybrid ranges between to Quantity of green cocoons required to produce 1 kg of raw silk is called as

(xiv) Reelability of thin shelled cocoon is (xv) After completion of spinning the larva and undergoes transforms into 10x1=10 (b) Write "True" or "False" : Transfer of newly hatched larvae (i) from the egg card to rearing bed is called brushing. (ii) Leaf should be harvested in noon. (iii) During moulting the worms requires high humidity. (iv) Low incubation temperature causes delayed hatching.

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(v)

Female pupae of silkworm weight more than male pupae.

(vi)

Bottle brush is low-cost montage.

(vii) Muga silkworm produce silk of golden yellow lusture. (viii) Daba and Sukinda are widely used for commercial Tasar cocoon production. (ix) Defective cocoons improve the reeling performance and quality of silk. (x) Returns realized from sale of reeling wastes is a part of gross returns. 3.

(a) Answer any five in 5 6 sentences each : 5x3=15 (i) What are diapause eggs ? -

(ii) (iii)

Disadvantages of tray rearing. Defective cocoons.

(iv)

Bed disinfectants.

(v)

Care during mounting.

(vi)

Silkworm rearing costs.

(vii) Late age rearing in oak Tasar. (b) Differentiate between the following : (i) Sheet and Loose silkworm eggs

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(ii)

Tray and shoot rearing

(iii)

Bullock pair day and man day

(iv)

Metamorphosis and moulting

(v)

Fixed and Variable costs

4

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