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The Diversion of Land, by C. Potter, P. Burnham, A. Edwards, R. Gasson & B. Green. ix + 130 pp. London: Routledge (1991). £35.00 (hard covers). ISBN 0 415 03627 5.

Published in association with the Australian Centre for International Agricultural Research, this book lists and gives descriptions of viruses from the Virus Identification Data Exchange database. After an introduction describing the database and showing how to use the book, there is an alphabetical listing of infected plant species and an alphabetical listing by families. The main part of the book deals with each virus in alphabetical order, giving such information as: natural host range and symptoms; transmission and ecology; geographical distribution; experimental host range; stability and concentration of particles in sap; purification; morphology; physical properties; chemical composition; replication; cytopathology; serology; relationships and diagnosis. There are lists of references for each. There is then a section devoted to virus group descriptions and appendices showing the questionnaire used to build up the database and the sources of commercially available diagnostic aids. The whole is very well produced and should form a standard reference manual for agricultural scientists who deal with plants and their diseases.