General aspects -- Parasitism and disease development -- Effects of pathogens on plant physiological functions -- Genetics of plant disease -- How pathogens attack plants -- How plants defend themselves against pathogens -- Environmental effects on the development of plant disease -- Plant disease epidemiology -- Control of plant diseases -- Environmental factors that cause plant diseases -- Plant diseases caused by fungi -- Plant diseases caused by prokaryotes : bacteria and mollicutes -- Plant diseases caused by parasitic higher plants, invasive climbing plants, and parasitic green algae -- Plant diseases caused by viruses -- Plant diseases caused by nematodes -- Plant diseases caused by flagellate protozoa.