AGRICULTURE


Paper-11

SECTION-A


1.Answer the following questions in about 150 wordseach:-15x4=60

(a)What are transgenics? Discuss the major biosafety concerns of genetically,modified crops.
(b)What are cytoplasmic mutations?Discuss their role in crop improvement.
(c)What is roguing Discuss its importance in quality seed production.
(d)Whatis photoinsensitivity Discuss its significance in crop production.

2.Answer the following in about 150 words each :15x4=60

(a)Describe.briefly the ultrastructure ofa plant cell.
Explain cell as a structural and functional unit of life.

(b)What are haploids How are they produced?
Discuss their applications in crop improvement.
(c)Discuss critically the strengths and weaknesses of seed industry in India.
What are plant antitranspirants Discuss their applications giving suitable examples.


3.Answer the following in about 150 words each :-15x4=60

What is heritability Explain the types of heritability and their significance in crop improvement.
What is hybridization Briefly discuss the techniques in hybridization.
Give a brief account of seed legislation in India.
Distinguish between the c3 and c4 mechanisms of photosynthesis and discuss the biological significance of c4 cycle

4.Write short notes on the following in about150 wordseach :-15x4=60
Somaclonal variation. and its use in crop improvement.
Molecular markers and their applications in plant improvement.
Seed registration.
Plant enzymes and their role in the vital activities of plants.

SECTION-B

5.Answer the following in about 150 words each :15x4=60
(a)Define polyembryony. Discuss its significance in hortiCulture with speCial reference to mango and citrus.
(b)Write the diagnostic symptoms of potato spindle
tuber disease,its mode of transmission and
management.
(c)What is micropropagation What are its
advantages? Give suitable examples of its
utilization in horticultural crops.
(d)What is a pheromone trap Discuss its use in pest
management.
6.Answer the following in about 150 words each :15x4=60
Describe candied fruits, glazed fruits and
crystallized fruits and give the principles involved
in their preservation.
(b)List out the major insect pests of citrus. Write in
detail about citrus psylla with its management.

(c)What is plant quarantine How does it regulate
the import and export of plants and seed material

(d)What is food security Write a note on food grain
production and food security.
7.Answer the following in about 150 words each :I5x4=60

(a)Elucidate the medicinal uses of 'Sarpagandha'
(Rauwolfia serpentina). Recommend the viable
production technology for 'Sarpagandha'.

(b)Describe the production technology, for carnation
under greenhouse conditions.
Write in brief the diagnostic symptoms of bunchy
top of banana, its mode of transmission and management practices to combat the problem.

Discuss the present status of cashewnut industry
in India with reference to production, productivity,
consumption and export.Suggest strategies for its
further improvement.

8.Write short notes on the following in about 150 words
each:-15x4=60

(a)Ikebana.
(b)NETO and NEPO viruses.
(c)Sex expression in papaya.
(d)Pesticide residue toxicity in fruits and vegetables.