BOT 552: PLANT DISEASE MANAGEMENT

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Understanding how disease cycles relate to diseaseseverity is assisted by the discipline of EpidemiologyEpidemiology is “the study of factors affecting theoutbreak and spread of infectious diseases”Or:the study of disease in populations, how diseasesincrease over space, in severity, or over time.
A central concept to epidemiology is that differentpathogen populations have different disease cycles.I. Monocyclic = single cycle (simple interest)I. Pathogens that complete one or even part of onedisease cycle/year are called monocyclicIn monocyclic pathogens the primary inoculum isthe only inoculum available for the entire season.There is no secondary inoculum and no secondaryinfection.The amount of inoculum produced at the end of theseason, however, is greater than at the start of theseason so the amount of inoculum may increasesteadily from year to year.
Page 1 and 2: PLANT DISEASE MANAGEMENTMajor Princ
Page 3: Major Principles of Plant Disease M
Page 6 and 7: C. Eradication of the Pathogen- Red
Page 8 and 9: E. Resistance of Plant to Pathogen-
Page 10 and 11: Disease TriangleHostTotal of all pr
Page 12 and 13: Therefore, disease management princ
Page 16 and 17: DiseaseThis representation of plant
Page 18 and 19: Examples of Monocyclic DiseasesBlac
Page 20 and 21: DiseaseGraphically this type of pop
Page 22 and 23: Many of these pathogens are dissemi
Page 24 and 25: Examples of Polyetic Diseases:Some
Page 26 and 27: Other Concepts Related to Disease C
Page 28 and 29: Propagule NumberGradients in pathog
Page 30 and 31: The percentage of disease and the s
Page 32 and 33: DiseasePurpose of disease managemen
Page 34 and 35: Ways to reduce disease (inoculum) a
Page 36: Management Strategiesa Sanitationb

BOT 552: PLANT DISEASE MANAGEMENT

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