LDE (other) • 2021 • Paper-II
Leaf Roller are major pest of mulberry in –
A)
South India
B)
Mizoram
C)
West Bengal
D)
Jammu & Kashmir
The Leaf Roller (primarily caused by the larvae of the moth *Apogonia* species or similar lepidopterans) is recognized as a significant pest of mulberry in the South Indian states, particularly in Karnataka and Tamil Nadu, where sericulture is highly concentrated. While mulberry pests can occur globally, the specific classification of 'Leaf Roller' as a 'major pest' is most prominently documented in the agricultural and sericultural literature of South India. In West Bengal, the more dominant pests are often the Mealybug or Thrips, and in the North/Himalayan regions, different climatic stressors and pests prevail. For the purpose of the SEO (Sericulture Extension Officer) examination, which draws from standard Indian sericulture manuals, South India is the identified region where this specific pest causes substantial economic impact.
LDE (other) • 2021 • Paper-II
Intra-veinal chlorosis followed by marginal necrosis and defoliation in the older leaves is deficiency symptom of –
A)
Iron
B)
Phosphorus
C)
Potassium
D)
Boron
Potassium deficiency can progress to marginal necrosis and defoliation of older leaves.
LDE (other) • 2021 • Paper-II
Deficiency of Potassium is corrected by adding __________ in two splits.
A)
180 kg P2O5/ha/yr
B)
120 kg P2O5/ha/yr
C)
150 kg P2O5/ha/yr
D)
170 kg P2O5/ha/yr
The keyed recommendation is 180 kg P2O5/ha/year in two splits.
LDE (other) • 2021 • Paper-II
Ant wells required in grainage to produce 20 lakhs dfls capacity per annum is –
A)
100 nos.
B)
200 nos.
C)
300 nos.
D)
400 nos.
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-II
Wilting of tender leaves and reduction of leaf turgidity is a sign of deficiency in –
A)
Sulphur
B)
Iron
C)
Manganese
D)
Copper
Manganese deficiency is associated with the stated symptom set among these choices.
LDE (other) • 2021 • Paper-II
Pick out micronutrient of mulberry plant.
A)
Phosphorus
B)
Copper
C)
Potassium
D)
Magnessium
Copper is a micronutrient; P and K are macronutrients and magnesium is a secondary nutrient.
LDE (other) • 2021 • Paper-II
Cesation of plant growth and interveinal chlorosis in older leaf is due to deficiency in –
A)
Phosphorus
B)
Magnesium
C)
Zinc
D)
Manganese
Magnesium deficiency commonly causes interveinal chlorosis in older leaves.
LDE (other) • 2021 • Paper-II
Deficiency of Nitrogen can be managed by adding __________ kg N/ ha/yr in 4-5 split dose after 3-4 weeks of every harvest.
A)
336
B)
366
C)
363
D)
343
The prescribed nitrogen application is about 336 kg N/ha/year in split doses.
LDE (other) • 2021 • Paper-II
The most practical and easy method to control mulberry pests under field conditions is -
A)
Physical Method
B)
Chemical Method
C)
Biological Method
D)
Cultural Method
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
Silkworm litter should be removed periodically, and the process of its removal is called:
A)
disinfection
B)
bed cleaning
C)
deflossing
D)
disinfectant
Removal of silkworm litter from the bed is called bed cleaning.
LDE (other) • 2021 • Paper-I
The size of moth is about:
A)
1 × 2 cm
B)
2 × 2 cm
C)
3 × 3 cm
D)
4 × 2 cm
An adult Bombyx mori moth is roughly 3 × 3 cm in the simplified measurement used here.
LDE (other) • 2021 • Paper-I
In male pupa, there is a small round spot on the __________ segment:
A)
6th
B)
7th
C)
8th
D)
9th
This is a standard Bombyx mori life-cycle or morphology fact.
LDE (other) • 2021 • Paper-I
__________ before brushing, disinfection should be done:
A)
1 day
B)
2 days
C)
3 days
D)
4 days
Rearing-room disinfection is completed about two days before brushing.
LDE (other) • 2021 • Paper-I
Time of harvesting preferable during:
A)
morning hours
B)
noon time
C)
evening hours
D)
night time
Harvesting is commonly preferred around noon/afternoon when leaves have suitable moisture balance.
LDE (other) • 2021 • Paper-I
Commercial formalin contains __________ formaldehyde:
A)
20 – 25 %
B)
26 – 30%
C)
36 – 40%
D)
40 – 45%
Commercial formalin is typically about 37–40% formaldehyde; among the given choices, 36–40% is the closest.
LDE (other) • 2021 • Paper-I
__________ method avoids the transmission of diseases through scion as it uses only a small portion of it:
A)
Root grafting
B)
Bud grafting
C)
Shoot grafting
D)
Layering
This follows the standard mulberry/sericulture cultivation recommendation for the stated condition.
LDE (other) • 2021 • Paper-I
The ideal range of pH value of soil for mulberry cultivation is:
A)
3.5 – 3.9
B)
4.9 – 5.5
C)
6.2 – 6.8
D)
7.2 – 7.2
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
Optimum temperature required during the 1st instar:
A)
10 – 150C
B)
15 – 180C
C)
26 – 280C
D)
28 – 320C
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
Wooden or bamboo rearing trays are arranged in tiers on rearing stand for rearing and is called:
A)
Floor rearing
B)
Tray rearing
C)
Self rearing
D)
Shoot rearing
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
The entire branch of mulberry plant is harvested and used to feed silkworms. This method is known as:
A)
Branch cutting
B)
Whole shoot harvest
C)
Leaf picking
D)
Root cutting
Harvesting the whole branch for feeding is termed whole-shoot harvest.
LDE (other) • 2021 • Paper-I
__________ formalin is used for routine disinfection of rearing room and rearing appliances prior to the commencement of rearing:
A)
2%
B)
5%
C)
8%
D)
10%
A dilute formalin solution (commonly about 2%) is used for routine disinfection.
LDE (other) • 2021 • Paper-I
Mulberry is mostly propagated through:
A)
Layering
B)
Grafting
C)
Sapling
D)
Cutting
This is the standard sericulture/agronomic practice for the condition stated.
LDE (other) • 2021 • Paper-I
Recommended doses of fertilizers after 2nd year onwards under rainfed condition:
A)
100N : 50P : 50K
B)
100N : 100P : 50K
C)
100N : 100P : 100K
D)
50N : 50P : 50K
This follows the standard mulberry/sericulture cultivation recommendation for the stated condition.
LDE (other) • 2021 • Paper-I
__________ races lay only non-hibernating eggs:
A)
Univoltine
B)
Bivoltine
C)
Multivoltine
D)
Commercial
Multivoltine races normally lay non-hibernating eggs.
LDE (other) • 2021 • Paper-I
In case of leaf harvest methods, the first harvest is taken __________ after 1st pruning:
A)
50 days
B)
70 days
C)
100 days
D)
120 days
The first harvest after the first pruning is around 70 days in the cited practice.
