Quiz_Plant_Pathogen

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1. The disease symptom necrosis refers to :

 
 
 
 

2. The causal organism of early blight of potato is :

 
 
 
 

3. Severe famine of West Bengal of 1942-43 was due to destruction of rice crop by a fungus called :

 
 
 
 

4. The pathogen that causes covered smut of Sorghum is :

 
 
 
 

5. Mixed cropping helps :

 
 
 
 

6. Leaves of pea show white powdery patches due to the growth of fungal mycelium with conidia and conidiophores. These are the symptoms of :

 
 
 
 

7. Banana bunchy top is caused by :

 
 
 
 

8. A branch of science that deals with nature, symptoms, development and control of plant diseases is called :

 
 
 
 

9. Chemicals which are applied soon after the outset of infection, suppress the development of pathogen, thus curing the plant, are called :

 
 
 
 

10. Which part of the plant is not affected by Albugo?

 
 
 
 

11. A control measure prior to the appearance of a particular disease comes under :

 
 
 
 

12. Which of the following is not a correct match?

 
 
 
 

13. An excessive enlargement of diseased organ because of increase in the number of cells is called :

 
 
 
 

14. Which of the following statements is not correct?

 
 
 
 

15. Late blight of potato is caused by :

 
 
 
 

16. Ergot is obtained from :

 
 
 
 

17. Red rot of sugarcane is caused by :

 
 
 
 

18. Aflatoxin is produced as a product in :

 
 
 
 

19. A part of pathogen that is transmitted to the host is termed as :

 
 
 
 

20. The disease occurring more or less regularly from year to year in a particular locality is referred to as :

 
 
 
 

21. Chief constituents of bordeaux mixture are :

 
 
 
 

22. In plants, the substances which accumulate around the site of infection are :

 
 
 
 

23. When an infection is very wide in occurrence, it is called :

 
 
 
 

24. Etiology includes the study of :

 
 
 
 

25. Body disorders due to harmful physiological changes are known as :

 
 
 
 

26. Which of the following is not a viral disease?

 
 
 
 

27. Pythium debaryanum is the causative agent of:

 
 
 
 

28. Red rot of sugarcane is caused by :

 
 
 
 

29. A diseased leaf shows some areas with dead tissue. This symptom is often referred to as :

 
 
 
 

30. Propagating materials like seeds, tubers, grafts and bulbs can be kept free of pathogens by :

 
 
 
 

31. Which of the following is the most destructive enemies of mankind?

 
 
 
 

32. Black rust of wheat is caused by:

 
 
 
 

33. When a diseased plant is legally stopped from export, this is done under :

 
 
 
 

34. Downy mildew disease is caused by :

 
 
 
 

35. The smut mycelium which initiates the infection is usually :

 
 
 
 

36. Which of the following causes smut disease in cultivated plants?

 
 
 
 

37. Helminthosporium oryzae was the cause of disaster :

 
 
 
 

38. Small epidermal swellings due to infection are called :

 
 
 
 

39. Disease resistant plant varieties can be produced by :

 
 
 
 

40. There is a class of phenolic compounds produced by the host plant in response to fungal infections :

 
 
 
 

41. Leaf spot of groundnut is caused by :

 
 
 
 

42. Which of the following is not a fungal disease?

 
 
 
 

43. The inability of a plant to resist the effects of a pathogen or any other damaging factors is known as :

 
 
 
 

44. Quarantine regulations are concerned with:

 
 
 
 

45. Citrus canker is caused by :

 
 
 
 

46. There are some dead and corky areas with definite margins on the stem, branches and fruits of lemon. This disease should be :

 
 
 
 

47. If a disease appear on large scale after a long interval it is :

 
 
 
 

48. The scientist who is famous for his research on rust fungi in India is :

 
 
 
 

49. A disease is abnormal state that may result due to :

 
 
 
 

50. Which of the following does not help in penetration of pathogen into the host?

 
 
 
 

51. Smut of maize is caused by :

 
 
 
 


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