PAT 101 (2+1) Fundamentals of Plant Pathology Question Paper

UNIVERSITY OF AGRICULTURAL SCIENCES, RAICHUR

DEPARTMENT OF PLANT PATHOLOGY, COLLEGE OF AGRICULTURE, RAICHUR
Midterm Exam: PAT – 101 (2+1): Fundamentals of Plant Pathology
Time: 1.30 hrs Max. Marks: 25

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Q. I. Choose the correct answer: (0.25 × 20 = 5.00)

1. Bordeaux mixture was discovered by
   a) Kittle son
   b) Coleman
   c) Millardet
   d) Mayer

2. An absorbing organ of the fungus is
   a) Haustorium
   b) Appressorium
   c) Ascogonium
   d) Hyphae

3. The study of factors affecting the outbreak & spread of disease is known as
   a) Etiology
   b) Epidemiology
   c) Etymology
   d) Etiolation

4. Yellowing of leaves due to lack of light is
   a) Etiolation
   b) Enation
   c) Albino
   d) Chlorosis

5. A complete virus is known as
   a) Viroid
   b) Virion
   c) Satellite RNA
   d) All the above

6. Pick out odd one
   a) Cleistothecium
   b) Perithecium
   c) Apothecium
   d) Trichothecium

7. A disease responsible for the discovery of Bordeaux mixture is
   a) Coffee leaf rust
   b) Late blight of potato
   c) Brown spot of rice
   d) Downy mildew of grapes

8. Irish famine was due to
   a) Helminthosporium
   b) Phytophthora
   c) Pyricularia
   d) Hemileia

9. Red rust diseases are caused by
   a) Fungi
   b) Algae
   c) Virus
   d) Phytoplasma

10. Production of orange brown pustule is the characteristic symptoms of
    a) Rust
    b) Smut
    c) Powdery mildew
    d) Downy mildew

11. Sexual fruiting body of the fungi is
    a) Sporodochium
    b) Pycnidium
    c) Cleistothecium
    d) Acervulus

12. Crystallization of virus particle was described by
    a) Beijerinck
    b) Stanley
    c) Mayer
    d) E.F. Smith

13. Repeated spore in rust fungi is
    a) Urediospore
    b) Teliospore
    c) Oospore
    d) Chlamydospore

14. Pomegranate blight is caused by
    a) Fungi
    b) Bacteria
    c) Viroids
    d) Protozoa

15. Virus are made up of
    a) Nucleic acid
    b) Protein
    c) Amino acid
    d) Nucleoprotein

16. Cysts are caused by
    a) Meloidogyne
    b) Rhizobium
    c) Heterodera
    d) Rhizoctonia

17. Ability of an organism to cause a disease is
    a) Pathogen
    b) Pathogenicity
    c) Pathogenesis
    d) None

18. Naked virus is
    a) Virion
    b) Sat-RNA
    c) TMV
    d) Viroids

19. Koch’s postulates related to
    a) Pathogen
    b) Pathogenicity
    c) Pathogenesis
    d) Symptoms

20. Excessive enlargement of cell size is due to
    a) Atrophy
    b) Hypertrophy
    c) Hyperplasia
    d) Hypotrophy

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Q. II. State TRUE or FALSE: Correct the False statements (Underlined words only): (0.25 × 10 = 2.5)

1. Bengal famine is related to coffee leaf rust epidemics

2. Oogonium is male sex organ in fungi

3. Sporadic diseases occurs constantly in a particular locality year after year

4. Striga is a complete stem parasite

5. Most of the plant diseases are caused by bacteria

6. Conidiophores are cemented and conidia are free in sporodochium

7. Zoospore is an asexual spore

8. Paratrichodorus sp. is the smallest plant parasitic nematode

9. Burrowing nematode is a sedentary endoparasite

10. Citrus tristeza is caused by viroid

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Q. III. Fill up the blanks with suitable words: (0.25 × 8 = 2.0)

1. Orobanche is commonly known as ______ whereas Loranthus is a partial stem parasite on mango

2. Cell wall of Oomycetes is made up of ______ whereas in ascomycetes consists of ______

3. Phyllody disease are caused by ______ whereas papaya leaf curl is caused by ______

4. Motile spores are also called as ______ whereas hyphae without cross wall is called ______

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Q. IV. Match the following: (0.25 × 10 = 2.50)

Column I

1. Leaf curl

2. Root nodule

3. Helminthosporium sp.

4. Phloem necrosis of coffee

5. Root-knot

6. Red rust

7. Khaira

8. Coconut cadang cadang

9. Late blight of potato

10. Black heart of potato

Column II
A. Rice
B. Epidemic disease
C. Bacterium
D. Nematode
E. Viroid
F. Algae
G. Virus
H. Zn-deficiency
I. Abiotic disease
J. Protozoa

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Q. V. Define/Explain the followings in one sentence (0.5 × 5 = 2.50)

1. Peritrophs

2. Polyetic disease

3. Cross protection

4. Epiphytotic disease

5. Heteroecious rust

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Q. VI. Differentiate the followings with suitable examples (1 × 5 = 5.00)

1. Pythium and Phytophthora

2. Pandemic and Sporadic diseases

3. Uncinula and Phyllactinia

4. Sclerospora and Plasmopara

5. Bacteria and Fungi

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Q. VII. Answer the following Questions in detail (1+1+2+2)

1. Mention the general characters of plant parasitic nematodes?

2. List any two diseases caused by spiroplasma and bacteria?

3. Describe the contributions of
   a) Needham
   b) Beijerinck
   c) A. de Barry
   d) E.F. Smith

4. Write a note on reproduction in fungi?

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*** GOOD LUCK ***

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