Quiz_Plant_Pathogen

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

4. Smut of maize is caused by :

 
 
 
 

5. Downy mildew disease is caused by :

 
 
 
 

6. Leaf spot of groundnut is caused by :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

10. Helminthosporium oryzae was the cause of disaster :

 
 
 
 

11. Pythium debaryanum is the causative agent of:

 
 
 
 

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

 
 
 
 

13. The disease symptom necrosis refers to :

 
 
 
 

14. Quarantine regulations are concerned with:

 
 
 
 

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

 
 
 
 

16. Aflatoxin is produced as a product in :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

19. Late blight of potato is caused by :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

23. Red rot of sugarcane is caused by :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

28. Black rust of wheat is caused by:

 
 
 
 

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

 
 
 
 

30. Which of the following statements is not correct?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

35. Mixed cropping helps :

 
 
 
 

36. Ergot is obtained from :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

39. Disease resistant plant varieties can be produced by :

 
 
 
 

40. Small epidermal swellings due to infection are called :

 
 
 
 

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

 
 
 
 

42. Citrus canker is caused by :

 
 
 
 

43. Chief constituents of bordeaux mixture are :

 
 
 
 

44. Banana bunchy top is caused by :

 
 
 
 

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

 
 
 
 

46. Etiology includes the study of :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

50. Red rot of sugarcane is caused by :

 
 
 
 

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

 
 
 
 


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