BOT 552: PLANT DISEASE MANAGEMENT

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DiseasePurpose of disease management is to prevent diseasefrom exceeding some level where profit or yield issignificantly diminished.Effect of Management on DiseaseMonocyclicDiseaseManagementUnmanagedDisease Level= Crop LossManagedDisease LevelPolycyclicTime
Principles of epidemiology indicates that controlmeasures can do this in only two ways.1. They may reduce (or delay) disease at the beginningof the season (x 0 ) or2. They may decrease the rate of disease development(r) during the growing period.
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 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 34 and 35: Ways to reduce disease (inoculum) a
Page 36: Management Strategiesa Sanitationb

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