Sericulture Extension Officer • 2022 • Technical Paper-III
To produce 50 litres of 5% bleaching and 0.3% slaked lime we need ________ bleaching powder and ________ slaked lime.
A)
5 kgs and 0.300 kg
B)
2.50 kgs and 0.150 kg
C)
0.25 kg and 0.015 kg
D)
0.50 kg and 0.030 kg
5% of 50L =2.5kg bleaching, 0.3% of 50L =0.15kg slaked lime by calculation.
Sericulture Extension Officer • 2022 • Technical Paper-III
In muga, egg laying is maximum in ________ .
A)
Autumn and spring
B)
Spring and summer
C)
Summer and Autumn
D)
After autumn and spring
Muga silkworm shows maximum oviposition in autumn and spring favorable seasons
Sericulture Extension Officer • 2022 • Technical Paper-III
Disinfection of rearing house in mulberry sericulture is done with 5% bleaching powder or ________.
A)
Slaked lime
B)
RKO
C)
Asthra
D)
7% formaldehyde
Mulberry rearing house disinfection: 5% bleaching powder or slaked lime (0.3%) / formalin alternative.
Sericulture Extension Officer • 2022 • Technical Paper-III
________ nos of moth examination tables are required for production of 15 lakhs nos Dfls/Annum.
A)
20
B)
15
C)
5
D)
10
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-III
The disease free layings/seeds so collected are soaked in ________ solution for 5 minutes to prevent contamination of germs on the egg shell etc.
A)
5% bleaching powder
B)
2% hypochlorite
C)
3% bleaching powder
D)
2% formaldehyde
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-III
Packing the eggs tight generates ________ and results in lack of air for respiration of eggs.
A)
Carbondioxide
B)
Carbonmonoxide
C)
Heat
D)
Viruses
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-III
“Decol” a disinfectant though the prescription inscribe 1:49 (Decol:water), for Mizoram ________ solution is best practice.
A)
1:40
B)
1:30
C)
1:35
D)
1:47
In the context of Sericulture (silkworm rearing), disinfectants are used to maintain a sterile environment to prevent the outbreak of diseases like Pebrine, Flacherie, and Grasserie. Decol is a common disinfectant used in the industry. While a standard prescription might suggest a dilution of 1:49 (which is roughly a 2% solution), practical field applications in specific regions like Mizoram often require a slightly higher concentration to ensure efficacy against local environmental pathogens and humidity levels. A dilution of 1:30 (approximately 3.3%) is the recognized 'best practice' in Mizoram sericulture guidelines to ensure a more potent disinfecting action in the rearing house, making it more effective than the standard 1:49 ratio.
Sericulture Extension Officer • 2022 • Technical Paper-III
________ nos of celluler is required to produced 15 lakhs Dfls/Annum for grainages of mulberry dfls.
A)
4,00,000
B)
3,00,000
C)
2,00,000
D)
1,00,000
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-III
Preservation of seed cocoon in muga requires ________ and ________ relatives humidity.
A)
20°C to 25°C and 70 - 75% relative humidity
B)
20°C to 24°C and 65 - 70% relative humidity
C)
26°C to 30°C and 70 - 90% relative humidity
D)
25°C to 27°C and 65 - 85% relative humidity
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-III
50 Dfls of Eri silkworm can be reared comfortably in a rearing house of ________ .
A)
30 ft × 12 ft
B)
30 ft × 15 ft
C)
24 ft × 12 ft
D)
24 ft × 15 ft
Eri rearing house 30ft×12ft (~360 sq ft) accommodates ~50 DFLs comfortably.
Sericulture Extension Officer • 2022 • Technical Paper-III
________ production preceeds the industrial cocoon production.
A)
Commercial Seed Cocoon
B)
Hybrid Seed Cocoon
C)
Seed Cocoon
D)
Bivoltine Seed Cocoon
Seed cocoon production precedes industrial/commercial cocoon production in sericulture cycle
Sericulture Extension Officer • 2022 • Technical Paper-III
The major parasites of muga silkworm are uzifly and ________ .
A)
Exorista sorbillans
B)
Apanteles glomeratus
C)
Nesolynx thymus
D)
Spilomicrus karnatakensis
Literature lists major parasitoids of muga as Uzi-fly Exorista sorbillans and Apanteles glomeratus.
Sericulture Extension Officer • 2022 • Technical Paper-III
The success of grainage depends on the ________ of desease free laying produced.
A)
Races
B)
Hybrid
C)
Quantity
D)
Quality
Grainage success depends on quality of disease-free layings produced, not just quantity.
Sericulture Extension Officer • 2022 • Technical Paper-III
Production of Seed Cocoon which can ________ in the emergence of moth is essential for grainage programme.
A)
Interfere
B)
Convergence
C)
Contrast
D)
Synchronise
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-III
Germ band formation generally takes place by ________ to ________ of egg laying of oviposition.
A)
14 to 16 hours
B)
17 to 18 hours
C)
20 to 24 hours
D)
24 to 26 hours
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-III
Incubation of mulberry Dfls required _______ temperature and a relative humidity of _______.
A)
240C and 70%
B)
250C and 80%
C)
260C and 85%
D)
230C and 75%
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-III
The causal organism of leaf galls in soalu plant is ________ .
A)
Pauropsylla niteria
B)
Halyomorpha halys
C)
Pauropsylla beesoni
D)
Pauropsylla trichopria
Leaf galls in soalu (Litsea) caused by Pauropsylla beesoni.
Sericulture Extension Officer • 2022 • Technical Paper-III
Egg laying is maximum in ________ and ________ season.
A)
Autumn and spring
B)
Summer and winter
C)
Winter and spring
D)
Summer and Autumn
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-III
Uzi fly (Thorang) lays about ________ eggs on silk worm larvae.
A)
5
B)
10
C)
20
D)
30
Uzi fly (Thorang) lays 1-2 eggs per larva, question among low options expects 5 as minimal cluster; total fecundity 300-1000.
Sericulture Extension Officer • 2022 • Technical Paper-III
The disease phyllactinia corylea (Pers) karst causes ________ .
A)
Leaf spot disease
B)
Leaf rust disease
C)
Powdery mildew
D)
Bacterial blight
Phyllactinia corylea causes powdery mildew of mulberry.
Sericulture Extension Officer • 2022 • Technical Paper-III
In hot acid treatment of bivoltine eggs are dipped in hydrochloric acid having a specific gravity of 1.0642 at ________ .
A)
440C
B)
450C
C)
460C
D)
470C
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The silkworm larval life is distinctly divided into
A)
Three stages
B)
Four stages
C)
Five stages
D)
Six stages
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The most common enemies of Muga silkworm is
A)
Carpenter ant
B)
Uzifly
C)
Fire ant
D)
Spider
Uzi fly is major parasitoid enemy of muga, along with wasps and ants.
Sericulture Extension Officer • 2022 • Technical Paper-II
Mention the most economical method of silkworm rearing in respect to labour requirements, bed cleaning, etc.
A)
Box rearing
B)
Floor rearing
C)
Shelf rearing
D)
Shoot rearing
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The wild Eri silkworm is
A)
Samia cynthia
B)
Antheraea mylitta
C)
Antheraea assamensis
D)
Philosamia ricini
Standard sericulture practice as per CSB manual.
