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Total no of Pages:

Register Number: 7693

Name of the Candidate:

Diploma ExAMINATION, 2012

(commercial floriculture)

(paper-I)

110. Growth and development of flower crops

Dec.) (Time: 3 Hours

Maximum: 100 Marks

I. Choose the correct answer for any TEN of the following (10×1=10)

  1. Leaf sampling analysis is done to assess

a) Nutrition b) T.S.S.c) Ascorbic acid

  1. Pollination can be aided by

a) Auxin b) Cytokinin c) CCC

  1. Breaking seed dormancy through

a) Ga3b) CCCc) Agno3

  1. Foliar nutrition can be given for flower crop though ______fertilizer

a) Urea b) Mixed fertilizer c) Superphosphate

  1. Shelf life of cut flowers can be enhanced by

a) 8 HQCb) CCCc) BA

  1. Chrysanthemum is ______type of plant.

a)Short day b) Long day c) Day neutral

  1. French marigold is

a)Annual b) Biennial c) Perennial

  1. Bud breaking chemical for use as foliar spray.

a) Sandolia b) DNOCc) CCC

  1. Drought tolerance is indicated by

a) Proline content b) Crude c) Starch

  1. The percentage of rooting of cuttings can be increased by

a) IBAb) BA c) SADH

  1. Growth retardant

a) CCCb) SADH c) Ethrel

  1. Rose belongs to the family

a) Oleaceae b) Rosaceae c) Solamaceae

II. Define any five of the following (5×2=10)

  1. salinity.
  2. Rooting cycle of flower crops
  3. Growth cycle of flower crops
  4. Shortday plants
  5. Growth retardents
  6. Training
  7. Senescence
  8. Growth

III. Write an essay on any FIVE of the following (5×4=20)

  1. Indicator plants
  2. Biennial
  3. Growth hormones.
  4. Flower set
  5. Flower drop
  6. Graft incompatibility
  7. Prumining
  8. Seed dormancy

iV. Write detailed answer for any five of the following (5×12=60)

  1. role of heat, cold and continuous moisture in flower crops.
  2. Physiology of the rooting of cuttings.
  3. Source-sink relationship using flowers as example-Explain.
  4. Post-harvest physiology of flower crops
  5. role of Retardants in flower crops
  6. Roles of PGR on propagation, flowering, shelf life of flower crops.
  7. Describe the factors affecting flowering.

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