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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 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 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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