Sericulture Objective Questions

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Objective Questions Papers on Sericulture

1. Causal organism of white muscardine in silkworm Bombyx mori is
(a) Nosema bombysis
(b) Streptococcus bombysis
(c) Bm CPV
(d) Beauveria bassiana

2. Sotto disease is caused by
(a) Aspergillosis
(b) Bacillus thurengiensis
(c) Streptococci bacteria
(d) Baculo virus

3. Vijetha is a
(a) General disinfectant
(b) Bed disinfectant
(c) Insecticide
(d) Pesticide

4. Indigenous hymenopterous ecto-pupal parasitoid used to kill the uzi pupa is
(a) Nesolyx thymus
(b) Dermester ater
(c) Labia arachidis
(d) Exorista bombycis

5. Nuclear polyhedrosis in silkworm is commonly known as
(a) Grasserie
(b) Flacherie
(c) Muscardine
(d) Pebrine

6. Which is not a silkworm disease?
(a) Grasserie
(b) Powdery mildew
(c) Flacherie
(d) Muscardine

7. Serious pest of silkworm is
(a) Dermestid beetle
(b) Jassid
(c) Uzi fly
(d) Rats

8. Pebrine is also known as
(a) Microsporidian diseases
(b) Bacterial diseases
(c) Bm NPV
(d) Sotto disease

9. Recommended dosage of disinfectant for rearing house and appliances
(a) 5% bleaching powder + 0.2% slaked lime
(b) 3% bleaching Powder + 0.5% slaked lime
(c) 5% bleaching powder + 0.3% slaked lime
(d) 2% bleaching powder +0.3% slaked lime

10. Chemical used for disinfection in Sericulture
(a) Formalin
(b) Bleaching powder
(c) Slaked lime
(d) All of these

11. The fungal infection caused by Apergillus flavus in Oak Tasar silkworm is controlled mainly by
(a) 5% Sulphuric acid
(b) Hygienic management
(c) 10% Hydrochloric acid
(d) Maintain low temperature and high humidity

12. Parasitoids that attacks Oak Tasar silkworm larvae
(a) Wasps
(b) Bugs
(c) Ants
(d) Preying mantis

13. The most common disease of Oak Tasar silkworm experienced in Mizoram
(a) Pebrine
(b) Tiger band disease
(c) Grasserie
(d) Muscardine

14. To avoid formation of clumps of eggs, the loose eggs are dipped for 10 mins in
(a) 2% formalin solution
(b) 2% formaldehyde solution
(c) 0.5% potassium carbonate solution
(d) 0.5% bleaching powder solution

15. The silkworm seed should be absolutely free from
(a) Grasserie disease
(b) Flacherie disease
(c) Muscardine disease
(d) Pebrine disease

16. Surface sterilization of DFLs means
(a) Treating the silkworm eggs with formalin
(b) Cleaning the tray
(c) Bed cleaning
(d) Disinfecting the rearing house

17. Disease free and quality silkworm eggs are produced in large quantities in
(a) Breeding station
(b) Breeding centre
(c) Hatcheries
(d) Grainage

18. A condition where bacteria multiply enormously in the blood of the larvae, pupae and moth
(a) Sotto
(b) Septicemia
(c) Polyhedral
(d) Mycosis

19. Poisonous substances entering into the silkworm through feeding, body contact etc are categorized under
(a) Chronic
(b) Infectious
(c) Non-infectious
(d) Sporadic

20. There are _____________ major components of soil.
(a) Two
(b) Five
(c) Four
(d) six

21. When soil is ploughed and cultivated the upper _____________ is modified.
(a) 10 – 12 cms
(b) 12 – 14 cms
(c) 12 – 18 cms
(d) 20 – 21 cms

22. Sub soil is _____________ the top soil.
(a) Below
(b) Shallow
(c) Hyper
(d) underneath

23. The optimum pH of soil for cultivation of mulberry is :
(a) 5.5 pH
(b) 6.8 pH
(c) 6.5 pH
(d) 7.00 pH

24. Mulberry grows best in :
(a) black soil
(b) loamy soil
(c) red
(d) sandy soil

25. The most popular propagation of Mulberry is :
(a) Sapling
(b) Cutting
(c) Grafting
(d) layering

26. Plants nutrients are mostly classified into :
(a) Two
(b) Three
(c) Four
(d) five

27. What are the top three macro nutrients?
(a) nitrogen, sulphur and phosphorous
(b) nitrogen, phosphorous and potassium
(c) nitrogen, phosphorous and manganese
(d) nitrogen, potassium, calcium

28. Soil has _____________ characteristics.
(a) Two
(b) Three
(c) Four
(d) five

29. Acidic soils occur in the _____________ areas.
(a) high rainfall
(b) low rainfall
(c) river bed
(d) slopy

30. Alkalinity of soil is due to the presence of high degree of :
(a) Salt
(b) Waste
(c) Urea
(d) humas

31. Acidic soil can be corrected by adding :
(a) Salt
(b) Sugar
(c) Lime
(d) calcium

32. Alkalic soil can be corrected by adding :
(a) Nitrogen
(b) Gypsum
(c) Oxygen
(d) H2SO4

33. In Mizoram Mulberry is mostly propagated through :
(a) stem cutting
(b) seedling
(c) layering
(d) stump

34. What is sapling?
(a) Mulberry cuttings used for further propagation
(b) It is a rooted cutting raised in the Mulberry bed
(c) It is a rooted cutting prepared from layering
(d) The stump preparation

35. The most suitable land for Mulberry nursery bed is :
(a) Land that received high rainfall
(b) Mild slope
(c) Flat of low lying are where drainage system is available
(d) Complete plain

36. In a bed size of 300 cms x 120 cms with 20 cms x 8 cms _____________ nos of cuttings can be accommodated.
(a) 240 nos
(b) 200 nos
(c) 180 nos
(d) 150 nos

37. For preparation of Mulberry cuttings the Mulberry branch should be _____________ old.
(a) 12 – 14 months
(b) 6 – 8 months
(c) 9 – 10 months
(d) 7 – 10 months

38. Best variety of Mulberry to be used in Mizoram is :
(a) BC2-59
(b) Kanva 2
(c) S1635
(d) Tr10

39. Most common disease in Mulberry nursery is :
(a) Fungal
(b) Tukra
(c) Powdery mildew
(d) Leaf spot

40. What is planting density?
(a) Variety of plants per unit area
(b) Number of plants present per unit area of land
(c) Number of plants per acre
(d) 1000 plants

41. Plants need _____________ elements for their growth.
(a) 14
(b) 13
(c) 15
(d) 16

42. Macro nutrients are nutrients required in _____________ quantity.
(a) Small
(b) Maximum
(c) minimum
(d) large

43. Based on quality of nutrients present in plants they can be classified into _____________ groups.
(a) Two
(b) Three
(c) Four
(d) five

44. Is NPK macronutrients?
(a) Yes
(b) No
(c) not at all
(d) partially

45. Adopting package of practices under rainfed condition leaf yield per hectare can be :
(a) 7 – 8 mt
(b) 8 – 9 mt
(c) 9 – 10 mt
(d) 10 – 12 mt

46. Under proper irrigated condition the leaf yield can be stepped up to :
(a) 30 – 35 mt
(b) 35 – 50 mt
(c) 40 – 60 mt
(d) 60 – 65 mt

47. What is pruning?
(a) The process of removing certain branches
(b) Systematic removal of branches to have a convenient shape and size of a plant
(c) To cut branches for better leaf yield
(d) Trimming

48. Powdery mildew is caused by the pathogen Phyllactinia corylea belonging to the class :
(a) Ascomycetes
(b) Imperfectii
(c) Basidiomycetes
(d) Pycnidospores

49. Whether drip irrigation is practiced in hilly region too?
(a) No
(b) Yes
(c) Sometime
(d) not at all

50. Light hoeing and weeding should be carried out after _____________ months of planting.
(a) Two
(b) Three
(c) Four
(d) five