Quiz_Plant_Pathogens

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

7. Chief constituents of bordeaux mixture are :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

10. Quarantine regulations are concerned with:

 
 
 
 

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

 
 
 
 

12. Ergot is obtained from :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

17. Leaf spot of groundnut is caused by :

 
 
 
 

18. Mixed cropping helps :

 
 
 
 

19. Helminthosporium oryzae was the cause of disaster :

 
 
 
 

20. Smut of maize is caused by :

 
 
 
 

21. The disease symptom necrosis refers to :

 
 
 
 

22. Pythium debaryanum is the causative agent of:

 
 
 
 

23. Aflatoxin is produced as a product in :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

27. Red rot of sugarcane is caused by :

 
 
 
 

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

 
 
 
 

29. Late blight of potato is caused by :

 
 
 
 

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

 
 
 
 

31. Banana bunchy top is caused by :

 
 
 
 

32. Red rot of sugarcane is caused by :

 
 
 
 

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

 
 
 
 

34. Citrus canker is caused by :

 
 
 
 

35. Etiology includes the study of :

 
 
 
 

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

 
 
 
 

37. Downy mildew disease is caused by :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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

 
 
 
 

41. Disease resistant plant varieties can be produced by :

 
 
 
 

42. Which of the following statements is not correct?

 
 
 
 

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

 
 
 
 

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

 
 
 
 

45. Small epidermal swellings due to infection are called :

 
 
 
 

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

 
 
 
 

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

 
 
 
 

48. Black rust of wheat is caused by:

 
 
 
 

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

 
 
 
 

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

 
 
 
 

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