MCQ on Plant Sciences

1. An example for a Gram +ve plant pathogenic bacteria is
   A. Pseudomonas
   B. Xanthomonas
   C. Erwinia
   D. Rathiaybacter

2. Irish famine was due to
   A. Helminthosporium
   B. Phytophthora
   C. Pyricularia
   D. Hemileia

3. Red rust of mango is caused by
   A. Fungi
   B. Algae
   C. Virus
   D. Phytoplasma

4. Which one is commonly known as grey mold fungus?
   A. Aspergillus terreus
   B. Penicillium notatum
   C. Botrytis cinerea
   D. Fusarium solani

5. Bordeaux mixture was discovered by Millardet during
   A. 1885
   B. 1895
   C. 1966
   D. 1886

6. Destructive Insect and Pest Act was passed in India during
   A. 1924
   B. 1914
   C. 1934
   D. 1904

7. Abnormal growth due to cell enlargement is known as
   A. Hypertrophy
   B. Hyperplasia
   C. Hypoplasia
   D. Necrosis

8. Khaira disease of rice is due to the deficiency of
   A. Zinc
   B. Manganese
   C. Magnesium
   D. Nitrogen

9. ________ is called as lesion nematode
   A. Paratylenchus
   B. Pratylenchus
   C. Trichodorus
   D. Longidorus

10. The Bengal famine was due to
    A. Piricularia grisea
    B. Rhizoctonia solani
    C. Drechslera oryzae
    D. Phytophthora

11. Agar agar is obtained from the sea weed
    A. Gelidium
    B. Peridium
    C. Water hyacinth
    D. Azolla

12. Oomycete septum is commonly observed in
    A. Basidiomycetes
    B. Ascomycetes
    C. Oomycetes
    D. Zygomycetes

13. Lichen is an association between
    A. Fungus and viruses
    B. Fungi and nematodes
    C. Fungi and bacteria
    D. Fungi and algae

14. Hybridoma technology is a new biotechnological approach for commercial production of
    A. Monoclonal antibodies
    B. Interferon
    C. Antibodies
    D. Polyclonal antibodies

15. An example of unicellular fungus is
    A. Rhizopus
    B. Mucor
    C. Yeast
    D. Erysiphe

16. Saaf is a fungicide which is combination of
    A. Mancozeb and Carbendazim
    B. Hexaconazole and Mancozeb
    C. Mancozeb and Fenamidone
    D. Mancozeb and Metalaxyl

17. Vector of bhendi yellow vein mosaic is
    A. White fly
    B. Aphid
    C. Thrips
    D. Jassids

18. Most effective fungicide against powdery mildew disease
    A. Mancozeb
    B. Karathane
    C. Captan
    D. Blitox

19. A plant pathogen used for gene transformation technique
    A. Agrobacterium
    B. Xanthomonas
    C. Erwinia
    D. Pseudomonas

20. Restriction of movement of diseased materials from one country to another
    A. Quarantine
    B. Exclusion
    C. Eradication
    D. None of the above

21. The fungus which produces five types of spores is
    A. Clavibacter sp
    B. Puccinia sp
    C. Rathiaybacter sp
    D. Ustilago sp

22. Teleomorphic stage of Fusarium is
    A. Ganoderma
    B. Gibberella
    C. Glomerella
    D. Guignardia

23. Potato spindle tuber is caused by
    A. Mycoplasma like organisms
    B. Rickettsia like organisms
    C. Viroids
    D. Flagellate protozoans

24. Disease cycle of wheat rusts in India was established for the first time by
    A. K.C. Mehta
    B. J.F. Dastur
    C. T.S. Sadasivan
    D. E.J. Butler

25. Xiphinema is commonly called as
    A. Dagger nematode
    B. Seed gall nematode
    C. Needle nematode
    D. Reniform nematode