The handbook for student and practising plant pathologists has been thoroughly reorganised and updated since the publication of the 2nd edition in 1983. Features include: rearrangement of topics to facilitate use; 49 short succinct chapters, each providing practical information; new topics - landmarks in plant pathology, survey of sampling procedures, disease evaluation, effects of climate change, biochemical and molecular techniques, epidemic modelling, breeding for resistance, laboratory safety and electronic databases; and seven overall sections covering disease recognition and evaluation, causation, diagnosis, investigation, control, general techniques, and presentation of results.