LDE (other) • 2021 • Paper-I
__________, in which the mulberry branches are cut around mid-height at about one metre:
A)
Bottom pruning
B)
Middle pruning
C)
Top pruning
D)
Ground pruning
This follows the standard mulberry/sericulture cultivation recommendation for the stated condition.
LDE (other) • 2021 • Paper-I
Required relative humidity during the 1st instar:
A)
70%
B)
75%
C)
80%
D)
85%
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
The process of transferring newly hatched larvae from egg sheet to rearing tray is called:
A)
Spinning
B)
Mounting
C)
Brushing
D)
Moulting
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
Mulberry grows best in:
A)
Alluvial soil
B)
Black soil
C)
Fertile soil
D)
Red loamy soil
This follows the standard mulberry/sericulture cultivation recommendation for the stated condition.
LDE (other) • 2021 • Paper-I
Mulberry is a perennial, and it consistently yields leaf for more than:
A)
5 – 10 yrs
B)
10 – 15 yrs
C)
15 – 20 yrs
D)
25 – 30 yrs
This follows the standard mulberry/sericulture cultivation recommendation for the stated condition.
LDE (other) • 2021 • Paper-I
In Mizoram, mulberry is generally propagated through:
A)
Seedling
B)
Cutting
C)
Sapling
D)
Layering
Mulberry (Morus spp.) is primarily propagated vegetatively to ensure that the offspring maintain the exact genetic characteristics of the parent plant, particularly for high-leaf-yield varieties used in sericulture. In Mizoram and other sericulture-growing regions, 'Stem Cuttings' are the most common and commercially viable method of propagation.
1. Why 'Cutting' is correct: Stem cuttings (usually 15-20 cm long) are planted during the rainy season. This method is faster, ensures uniformity in the plantation, and provides a higher success rate compared to seeds.
2. Why 'Seedling' is incorrect: Propagation by seeds often leads to high genetic variability, meaning the resulting plants may not produce the high-quality leaves required for silkworms.
3. Why 'Sapling' is incorrect: A sapling is a young tree; it is the result of propagation, not the method of propagation itself.
4. Why 'Layering' is incorrect: While layering is biologically possible for mulberry, it is labor-intensive and impractical for large-scale commercial plantation establishment in the hilly terrain of Mizoram.
LDE (other) • 2021 • Paper-I
The newly hatched larva is about __________ long:
A)
2 mm
B)
3 mm
C)
5 mm
D)
6 mm
A newly hatched Bombyx mori larva is approximately 3 mm long.
LDE (other) • 2021 • Paper-I
__________ is a term used in biology to indicate the number of broods or generations of an organism in a year:
A)
Moultinism
B)
Voltinism
C)
Multivoltine
D)
Univoltine
Voltinism denotes the number of broods/generations per year.
LDE (other) • 2021 • Paper-I
__________ directly affects the growth of the larvae and quality of cocoons:
A)
Humidity
B)
Temperature
C)
Heat
D)
Air
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
__________ is used to prevent evaporation of moisture and to maintain high humidity in the rearing bed:
A)
Foam rubber strip
B)
Paraffin paper
C)
Mats
D)
Ant well
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
The protective covering of the silkworm egg is called:
A)
micropyle
B)
endochorion
C)
chorion
D)
exochorion
The egg shell is the chorion.
LDE (other) • 2021 • Paper-I
Pupal period of bivoltine races of Bombyx mori is:
A)
12 – 15 days
B)
15 – 20 days
C)
20 – 25 days
D)
28 – 28 days
Bivoltine pupal duration is commonly around 15–20 days.
LDE (other) • 2021 • Paper-I
In tropical regions, the best orientation of rearing house will be __________ direction:
A)
North – South
B)
South – North
C)
East – West
D)
West – East
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
In case of male moth, __________ segments are visible in the abdomen.
A)
6th
B)
7th
C)
8th
D)
9th
This is a standard Bombyx mori life-cycle or morphology fact.
LDE (other) • 2021 • Paper-I
In order to loosen the soil, land should be prepared by deep ploughing with a mould up to a depth of:
A)
12 – 15cm
B)
15 – 20cm
C)
20 – 30cm
D)
30 – 40cm
This follows the standard mulberry/sericulture cultivation recommendation for the stated condition.
LDE (other) • 2021 • Paper-I
The newly hatched larva is __________ in colour:
A)
white
B)
black
C)
brown
D)
green
This is a standard Bombyx mori life-cycle or morphology fact.
LDE (other) • 2021 • Paper-I
During young age period, the silkworm body weight increase by:
A)
100 times
B)
200 times
C)
300 times
D)
400 times
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
The mesh size during 1st instar:
A)
1 mm2
B)
2 mm2
C)
3 mm2
D)
4 mm2
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
In general, a floor area of __________ is required for tray rearing method:
A)
1sq ft/dfl
B)
2sq ft/dfl
C)
3sq ft/dfl
D)
4sq ft/dfl
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
In India, the leaf picking starts about __________ after bottom pruning:
A)
2 weeks
B)
5 weeks
C)
10 weeks
D)
20 weeks
Under the stated practice, leaf picking begins about five weeks after bottom pruning.
LDE (other) • 2021 • Paper-I
Silkworm settle for first moult usually in __________ from the date of brushing:
A)
1 day
B)
2 days
C)
3 days
D)
5 days
Larvae generally settle for the first moult about two days after brushing.
LDE (other) • 2021 • Paper-I
Quantam of leaf required for late age silkworm rearing is about:
A)
50%
B)
75%
C)
84%
D)
94%
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
The destruction of disease causing germs is known as:
A)
disinfectant
B)
disinfection
C)
fumigation
D)
bed cleaning
Disinfection is the destruction/removal of disease-causing microorganisms.
LDE (other) • 2021 • Paper-I
Any biological material or process used for adding essential nutrient content to the soil is called:
A)
Chemical fertilizers
B)
Biofertilizers
C)
Organic Manure
D)
Manure
This follows the standard mulberry/sericulture cultivation recommendation for the stated condition.
LDE (other) • 2021 • Paper-I
Bombyx mori undergoes complete metamorphosis and has __________ stages in its life cycle:
A)
2
B)
3
C)
4
D)
5
The life cycle has four stages: egg, larva, pupa and adult.
