Introduction and Importance of Plant Pathology in Agriculture Plant Pathology-The Science History of Plant Pathology Important plant pathogenic organisms The Pathogens- Fungi Taxonomy and Nomenclature Classification of Fungi, Subdivision: Mastigomycotina Subdivision -Zygomycotina Subdivision: Ascomycotina, Subdivision -Basidimycotina Subdivition: Deuteromycotina Prokaryotes: Classification of Prokaryotes according to Bergey's Manual of Systematic Bacteriology The Pathogens-Bacteria The Pathogens-Viruses The Pathogens-Phytoplasmas, Spiroplasma and Fastidious Vascular Bacteria The Pathogens-Viroids, Algae and Protozoa and Prions The Pathogens- Nematodes The Pathogens-Phanerogamic Parasites Physiological disorders Basic terminology and definitions in plant pathology Classification of plant diseases General Symptoms of Plant Diseases Dispersal of Pathogens Survival of Plant Pathogens The infection process Pathogenesis: Role of enzymes, toxins, growth regulators, and polysaccharides Plant defenses Variation in Plant Pathogens Plant Disease Epidemiology Plant Disease Forecasting Principles of plant disease control Physical Management Cultural Management Biological Management Host plant resistance Regulatory methods - Plant Quarantine Chemical in Plant Disease Control Methods of application of Fungicides Application of biotechnology in plant disease management Integrated Disease Management Glossary References.