UAS/ACR/AT-301/AQ

10 marks / 45 min / Sem / 2016–17 / 01-08-2016

I. Fill in the blanks from the pool of answers given below

10 × 0.20 = 2.00

  1. Sexual stage of some fungi is also called as __________.

  2. Bengal famine was due to __________ disease of rice.

  3. Motile spores of fungi are called as __________.

  4. Flask-shaped asexual fruiting structure of fungi is known as __________.

  5. Nobel Prize for Neurospora crassa genetic research was received by __________ and __________.

  6. __________ is a phytoplasma disease of rice.

  7. The sexual fruiting structure of rice blast fungus is __________.

  8. Downy mildew fungus of sorghum belongs to family __________.

  9. False smut of rice is caused by __________.

  10. Naked multinucleate mass of protoplasm in lower fungi is called __________.

Answer Pool

(Pyricularia oryzae, Pythiaceae, Pontecorvo and Roper, Peronosporaceae, Sphacelotheca cruenta, Plasmodium, Protozoan, Oomycetes, Zoospores, Sheath blight, Acervulus, Synema, Telomorph, Apothecium, Anamorph, Brown spot, Sporangia, Ustilaginoidea virens, Rice yellow dwarf, Beadle and Tatum, Magnaporthe grisea, Uredospore, Conidia, Aplanospore, Perithecium, Pycnidium)

II. Choose the correct answer from the following

10 × 0.20 = 2.00

  1. Rice plants are more susceptible to blast due to increased application of

a. Iron b. Zinc c. Phosphorus d. Nitrogen

  1. White tip of rice is caused by

a. Aphelenchoides besseyi b. Hirschmanniella oryzae c. Meloidogyne incognita d. Ditylenchus angustus

  1. Khaira disease of rice is caused by deficiency of

a. Iron b. Zinc c. Sulphur d. Iron

  1. The fusion of nuclei during sexual reproduction of fungi is called as

a. Plasmogamy b. Karyogamy c. Dikaryotization d. Spermatization

  1. Primary source of inoculum of charcoal rot of sorghum is

a. Sclerotium b. Chlamydospore c. Conidia d. Dormant mycelium

  1. The body of the fungus is

a. Hypha b. Thallus c. Mycelium d. Rhizomorph

  1. The variation occurs in deuteromycetes fungi due to

a. Spermatisation b. Parasexuality c. Mutation d. Recombination

  1. Hidden enemies of farmers are

a. Viruses b. Spiroplasmas c. Bacteria d. Nematodes

  1. Udbatta disease of rice is caused by

a. Balansia oryzae b. Ephelis oryzae c. Both a and b d. None of them

  1. Rice tungro virus is transmitted by

a. Nephotettix virescens b. Nephotettix nigropictus c. Both a and b d. None of them


 III. Say True or False


10 × 0.20 = 2.00


1. Cleistothecium has narrow opening called ostiole.


2. Cochliobolin is an antibiotic produced by brown spot causing fungus of rice.


3. The nuclear condition of oospore is n+n.


4. Primary source of inoculum of sheath blight of rice is chlamydospore.


5. Leaf blast causes more damage to rice crop than neck blast.


6. Wettable sulphur is recommended for the management of grain smut of sorghum.


7. Xanthomonas oryzae pv. oryzae enters paddy leaves through hydathodes or wounds.


8. Striga is a complete root parasite of sorghum.


9. Yeast fungi are employed in baking and brewing industries.


10. Peronospora produces right angle branching sporangiophore.


V. Mention the Distinguishing Diagnostic Symptom/s, Primary Source of Inoculum and an Effective Chemical/s for Management of Following Diseases


4 × 0.5 = 2.0


 1. Bacterial leaf blight of rice


2. Sheath blight of rice


3. Downy mildew of sorghum


 4. Sugary disease of sorghum