BOT 552: PLANT DISEASE MANAGEMENT

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Ways to reduce disease (inoculum) at beginning (x 0 )Affects monocyclic and polycylic diseasesFumigation Certified seedSanitation Seed treatmentsQuarantine Host plant resistanceWays to decrease the rate of disease development(infection rate) (r)Change the environmentFertilizer applicationHost plant resistanceWays to change t (see “b” on figure)Harvest early before disease becomes severe.Plant early (cereal cyst nematode)
Control of different diseases requires differentstrategies.Some pathosystems, monocyclic and polyetic diseasescan be effected by use of an x 0 -reducing practice only.However, for most diseases more than one controlprocedure is used and these are often chosen toreduce x 0 and r.These integrated control measures use a combinationcultural methods, resistance breedingregulatory actions, chemical control measures
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 32 and 33: DiseasePurpose of disease managemen
Page 36: Management Strategiesa Sanitationb

BOT 552: PLANT DISEASE MANAGEMENT

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