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Principles of Plant Pathology Topic 1 Oomycota.

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Presentation on theme: "Principles of Plant Pathology Topic 1 Oomycota."— Presentation transcript:

1

2 Principles of Plant Pathology

3

4 Topic 1 Oomycota

5 Topic 2 Ascomycota

6 Topic 3 Symptoms And Signs

7 Topic 4 Disease Management

8 Topic 5 Terminology

9 Topic 6 Mycology

10 Jeopardy OomycotaAscomycota Symptoms And Signs Disease Management Terminology Mycology Final Jeopardy! 300

11 Oomycota for $100 The sexual spore of the Oomycota.

12 Oomycota for $100 Correct Question: What is an oospore?

13 Oomycota for $200 One of the two survival spores or structures of the Oomycota.

14 Oomycota for $200 Correct Question: What is a chlamydospore or oospore.

15 Oomycota for $300 The motile spore that typically infects the host.

16 Oomycota for $300 Correct Question: What are zoospores?

17 Oomycota for $400 The hyphae in the Oomycota lack this structure, resulting in the organisms in this group being referred to as coenocytic.

18 Oomycota for $400 Correct Question: What are septations?

19 Oomycota for $500 Present in cell walls of true fungi, cell walls of organisms in the Oomycota do not contain this ingredient

20 Oomycota for $500 Correct Question: What is chitin?

21 Ascomycota for $100 Sexual spore produced in asci

22 Ascomycota for $100 Correct Question: What are ascospores?

23 Daily Double

24 Daily Double Question The two structures pictured here that give rise to apothecia.

25 Daily Double Answer What is a mummy and a sclerotium?

26 Ascomycota for $300 The overwintering structure for powdery mildew fungi

27 Ascomycota for $300 Correct Question: What are chasmothecia or cleistothecia?

28 Ascomycota for $400 The asexual spore responsible for secondary infections in diseases caused by Ascomycota.

29 Ascomycota for $400 Correct Question: What are condia?

30 Ascomycota for $500 Type of epidemic caused by the Dutch elm disease and chestnut blight pathogens.

31 Ascomycota for $500 Correct Question: What is polyetic?

32 Symptoms and Signs for $100 Yellowing caused by loss of chlorophyll

33 Symptoms and Signs for $100 Correct Question: What is chlorosis?

34 Symptoms and Signs for $200 My presence is used in diagnosis of disease

35 Symptoms and Signs for $200 Correct Question: What are signs?

36 Symptoms and Signs for $300 A localized area of necrosis.

37 Symptoms and Signs for $300 Correct Question: What is a lesion?

38 Symptoms and Signs for $400

39 Symptoms and Signs for $400 Correct Question: What are galls and teliospores?

40 Symptoms and Signs for $500 The period of time between infection and symptom development.

41 Symptoms and Signs for $500 Correct Question: What is incubation period?

42 Disease Management for $100 A compound that inhibits or kills fungi.

43 Disease Management for $100 Correct Question: What is a fungicide?

44 Disease Management for $200 A cultural control practice that uses the planting of different crops over time to reduce pathogen inoculum

45 Disease Management for $200 Correct Question: What is crop rotation?

46 Disease Management for $300 Use of one organism to eliminate or control another organism.

47 Disease Management for $300 Correct Question: What is a biocontrol?

48 Disease Management for $400 Removal of infected plants to prevent pathogen spread.

49 Disease Management for $400 Correct Question: What is roguing?

50 Disease Management for $500 An effective treatment based on virus infection of a pathogen that controlled Chestnut Blight in Europe but not North America.

51 Disease Management for $500 Correct Question: What is hypovirulence?

52 Terminology for $100 Death of cells or tissue, usually accompanied by black or brown discoloration.

53 Terminology for $100 Correct Question: What is necrosis?

54 Terminology for $200 A living organism able to transmit or disseminate a pathogen leading to a spread of a disease.

55 Terminology for $200 Correct Question: What is a vector?

56 Terminology for $300 An organism that can live and multiply only on living cells; sometimes used as a synonym of obligate parasite.

57 Terminology for $300 Correct Question: What is a biotroph?

58 Terminology for $400 A site in or on a host plant where infection of host cells can occur.

59 Terminology for $400 Correct Question: What is an infection court?

60 Terminology for $500 The percentage of plants affected by a disease within a population.

61 Terminology for $500 Correct Question: What is disease incidence?

62 Mycology for $100 A mass of hyphae.

63 Mycology for $100 Correct Question: What is a colony or mycelium?

64 Mycology for $200 Genus of pathogen that causes damping-off disease.

65 Mycology for $200 Correct Question: What is Rhizoctonia?

66 Mycology for $300 Members of this group of fungus- like organisms cause downy mildew diseases.

67 Mycology for $300 Correct Question: What are oomycetes?

68 Mycology for $400 A fungal structure that absorbs nutrients from living cells.

69 Mycology for $400 Correct Question: What is a haustorium?

70 Mycology for $500 The sexual stage in the life cycle of a fungus.

71 Mycology for $500 Correct Question: What is the teleomorph stage?

72 Final Jeopardy Topic

73 Final Jeopardy Question

74 Final Jeopardy Answer

75 Thank you for playing!


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