BOT 552: PLANT DISEASE MANAGEMENT

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Disease TriangleHostTotal of all properties that affect susceptibilityPathogenTotal of all properties of pathogen(virulence, abundance, etc.)EnvironmentTotal of all conditionsthat affect diseaseAll three factors are necessary components of diseaseIf components could be quantified,Area of triangle would represent amount of disease.
Vanderplank’s Equivalence Theorem“Effects of host, pathogen and environment can betranslated into terms of the rate parameter of anepidemic”Changes in any component has an equivalent effecton disease- More-less susceptible host All affect- More-less aggressive pathogen amount of- More-less favorable environment disease
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 12 and 13: Therefore, disease management princ
Page 14 and 15: Understanding how disease cycles re
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

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