Principles and Methods -- Plant disease diagnosis -- Disease assessment and yield loss -- Surveys of variation in virulence and fungicide resistance and their application to disease control -- Infection strategies of plant parasitic fungi -- Epidemiological consequences of plant disease resistance -- Dispersal of foliar plant pathogens: mechanisms, gradients and spatial patterns -- Pathogen population dynamics -- Modelling and interpreting disease progress in time -- Disease forecasting -- Diversification strategies -- Epidemiology in sustainable systems -- Information technology in plant disease epidemiology -- Case Examples -- Seedborne diseases -- Diseases caused by soil-borne pathogens -- Wind-dispersed diseases -- Environmental biophysics applied to the dispersal of fungal spores by rain-splash -- Potato late blight -- Apple scab: role of environment in pathogen and epidemic development -- Onion diseases -- The recent epidemic of cassava mosaic virus disease in Uganda.