Sericulture Extension Officer • 2022 • Technical Paper-II
In humid conditions, paraffin paper method of rearing can causes
A)
Pebrine
B)
Muscardine
C)
Sotto disease
D)
Septicaemia
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The spinning is continues after completely enveloped by the cocoon for another
A)
1 - 2 days
B)
2 - 3 days
C)
3 - 4 days
D)
4 - 5 days
After enclosing, silkworm continues spinning inside for 1-2 days to harden cocoon.
Sericulture Extension Officer • 2022 • Technical Paper-II
The size of the chopped leaves for the 2nd instar Mulberry silkworm is
A)
1.0 - 1.5 cm
B)
1.5 - 2.0 cm
C)
2.0 - 4.0 cm
D)
4.0 - 6.0 cm
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
In India, ‘Rangi’ is one of the silkworm diseases, the other name is
A)
Court disease
B)
Septicaemia
C)
Bacterial flacherie
D)
Sotto disease
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
What is the year when the raw Silk was exported from India to Rome during the reign of Kanishka probably through the Silk road?
A)
38 B.C.
B)
58 B.C.
C)
80 B.C.
D)
90 B.C.
Traditionally 58 BC taken as date for silk export India to Rome via Silk Road during Kanishka Kushana era
Sericulture Extension Officer • 2022 • Technical Paper-II
During disinfection of Rearing house the room temperature should be maintained preferably at
A)
20°C
B)
23°C
C)
25°C
D)
30°C
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
In Muga silkworm rearing maximum ripening of larvae is during
A)
Morning
B)
Day time
C)
Evening
D)
Early night hours
In muga, maximum larval ripening occurs during morning hours, similar to mulberry mounting schedule.
Sericulture Extension Officer • 2022 • Technical Paper-II
In India, the top three raw Silk producers are
A)
West Bengal, Jharkhand, Mizoram
B)
Karnataka, Andha Pradesh, Assam
C)
Karnataka, Tamil Nadu, Assam
D)
West Bengal, Assam, Tamil Nadu
Top producers Karnataka, Andhra Pradesh, Assam.
Sericulture Extension Officer • 2022 • Technical Paper-II
The predator which eat the silkworms as such and also the pupae after biting open the cocoons is
A)
Lizards
B)
Dermestid beetles
C)
Birds
D)
Rats
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
Top three raw Silk producers in the World are
A)
China, South Korea, Thailand
B)
Japan, Brazil, Iran
C)
India, Japan, North Korea
D)
China, India, Uzbekistan
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The cheapest and quickest method of crop improvement in Mulberry breeding programme is
A)
Selection
B)
Hybridization
C)
Variation
D)
Mutation breeding
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
Select the beneficial mutants produced through chemical mutagenesis by CSR & TI, Mysore
A)
S 54
B)
TR 10
C)
Kosen
D)
BC 2 59
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
In Chawki rearing the optimum temperature maintained is
A)
24°C
B)
25°C
C)
26°C
D)
27°C
Chawki rearing optimum temp 27°C (26-28°C range).
Sericulture Extension Officer • 2022 • Technical Paper-II
In tropical areas the ideal harvesting time is
A)
3rd day of spinning
B)
4th day of spinning
C)
5th day of spinning
D)
7th day of spinning
In tropical conditions ideal cocoon harvest is 5th day of spinning (6-7 day in temperate).
Sericulture Extension Officer • 2022 • Technical Paper-II
The first record of Pebrine occurrence comes from France in
A)
1840
B)
1845
C)
1850
D)
1855
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
Respiratory function of silkworm larva is carried out through
A)
Spiracles
B)
Taenidium
C)
Rectum
D)
Tracheal bush
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The life cycle of Muga silkworm in winter can prolonged to
A)
80 days
B)
100 days
C)
120 days
D)
140 days
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The major elements which are essential for plant growth are
A)
Ca, Mg, S
B)
Cu, Co, B & Cl
C)
N, P, K
D)
Fe, Mn, Zn
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
What is the percentage of formalin used to disinfect the rearing room and appliances after pebrine infection prior to the beginning of the next rearing?
A)
2 %
B)
3 %
C)
5 %
D)
7 %
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The most appropriate method of brushing for loose eggs is
A)
Husk method
B)
Cloth/paper method
C)
Feather method
D)
Net and feeding
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
The only indigenous Mulberry Univoltine race of India is
A)
C. Nichi
B)
Chotopulu
C)
Nistari
D)
Borapalu
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
Among the following Silk, which one is not Vanya Silk?
A)
Muga
B)
Oak tasar
C)
Mulberry
D)
Eri
Standard sericulture practice as per CSB manual.
Sericulture Extension Officer • 2022 • Technical Paper-II
Silk is
A)
Natural polymers – rayon
B)
Animal products – wool
C)
Animal products – fibrous protein
D)
Synthetic fibres – acrylics
Silk is animal fibrous protein fibroin produced by silkworm
Sericulture Extension Officer • 2022 • Technical Paper-II
Shorea robusta is the food plant of
A)
Eri Silkworm
B)
Tropical tasar Silkworm
C)
Temperate tasar Silkworm
D)
Muga Silkworm
Shorea robusta (Sal) is primary food plant of tropical tasar silkworm Antheraea mylitta.
Sericulture Extension Officer • 2022 • Technical Paper-II
How many times we should do bed cleaning in Mulberry silkworm rearing at 3rd instar?
A)
Once
B)
Twice
C)
Thrice
D)
Once every day
Standard sericulture practice as per CSB manual.
