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Introduction
Causes
Meaning
Scope of     Management
Factors affecting occurrence
Causal   Organisms
lBacteria
lFungi
lVirus
lNematodes
Transmission of diseases
Diseases of important crops
Extent of losses.
Preventive Measures and Control Measures
Modern fungicides
Techniques of fungicide use
Precautions.
lProblems of residues
lPlant guarantine.