Pathogens and Host Symptoms

  • G. R. Dixon


Pathology has been described by Wood (1967) as ‘a science rooted in the practice of learning about diseases of economically important plants in order to reduce losses of crops caused by them’. Hence it is important for the pathologist to understand the relative significance of the crops whose pathogens he investigates. The following data highlight the value of vegetable crops, albeit they refer solely to the UK, but similar trends are found elsewhere, while in underdeveloped countries the very dietary importance of vegetables gives them even greater value. The 1975 farm-gate value of vegetables was £384 million, compared to £807 million for cereals and £100 million for fruit. In that year Britain spent £14 000 million on food of which £1500 million went on vegetables. This is equal to twice the expenditure on fruit, three times that on fish, equal to the outlay on bread and half that spent on meat, which is the largest cost in the food budget. In general terms the housewife spent 18 per cent of her money on fruit and vegetables. In this area of crop production the UK is very largely self-sufficient which, in terms of import savings, is an important factor. The UK is well suited climatically for vegetable production, and in general crops are produced on large scale, highly mechanised farms with a high level of efficiency. Land area needed for vegetable production is small, 185 000 ha in the UK, of which 109 000 ha are processing vegetables and of this 54 000 ha are wining peas; this compares to 3 713 000 ha needed for cereal production.


Vegetable Crop Crown Gall Potato Leaf Roll Virus Tobacco Streak Virus Beet Yellow Virus 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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  1. Ainsworth, G. C. (1966). A General Purpose Classification of Fungi. Bibliography of Systematic Mycology, Vols 1–4. Commonwealth Mycological Institute, Kew.Google Scholar
  2. Bawden, F. C. (1964). Plant Viruses and Virus Diseases. Ronald Press, New York.Google Scholar
  3. Beijerinck, M. W. (1898). Verhandel K. Akad. Wet. 6, 1–22.Google Scholar
  4. Bose, R. D. and Misra, S. D. (1938). Indian J. agric. Sci. 8, 417–23.Google Scholar
  5. Cadman, C. H. (1963). A. Rev. Phytopath. 1, 143–72.CrossRefGoogle Scholar
  6. Chupp, C. and Sherf, A. F. (1966). Vegetable Diseases and Their Control Ronald Press, New York.Google Scholar
  7. Dawson, W. J. (1957). Plant Diseases Due to Bacteria Cambridge University Press, London.Google Scholar
  8. Federation of British Plant Pathologists (1973). A Guide to the Use of Terms in Plant Pathology. Phytopathological Papers no. 17. Commonwealth Mycological Institute, Kew.Google Scholar
  9. Fincham, J. R. S. and Day, P. R. (1965). Fungal Genetics. Blackwell Scientific Publications, Oxford.Google Scholar
  10. Fulton, R. W. (1948). Phytopathology 38, 421–8.Google Scholar
  11. Gibbs, A. J., Harrison, B. D., Watson, D. H. and Wildy, P. (1966). Nature, Lond 209, 450–4.CrossRefGoogle Scholar
  12. Harrison, B. D. (1964). In Plant Virology (M. K. Corbett and H. D. Sisler, eds). Florida University Press, Gainesville, Fla, pp. 118–47.Google Scholar
  13. Hawker, L. E. (1966). Fungi Hutchinson, London.Google Scholar
  14. Iwanowsky, D. (1892). St Petersb. Acari imp. Sci Bull. 35, 67–70.Google Scholar
  15. Mayer, A. E. (1882). Voorloopie Meded. Landbou. Tijdschr. 359–64.Google Scholar
  16. Pal, B. P. and Nath, P. (1935). Indian J. agric. Sci. 5, 517–22.Google Scholar
  17. Reid, M. S. and Matthews, R. E. F. (1966). Virology 28, 563–70.CrossRefGoogle Scholar
  18. Shepherd, R. J., Wakeman, R. J. and Ramanko, R. R. (1968). Virology 36, 150–2.CrossRefGoogle Scholar
  19. Smith, K. M. (1960). Plant Viruses. Methuen, London.Google Scholar
  20. Smith, R. E. and Boncquet, P. A. (1915). Phytopathology 5, 103–7.Google Scholar
  21. Stapp, C. (1961). Bacterial Plant Pathogens. Oxford University Press, London.Google Scholar
  22. Tarr, S. A. J. (1972). The Principles of Plant Pathology. Macmillan, London.CrossRefGoogle Scholar
  23. Webster, J. (1970). Introduction to Fungi. Cambridge University Press, London.Google Scholar
  24. Westcott, C. (1967). Plant Disease Handbook. Van Nostrand, Princeton, N. J.Google Scholar
  25. Wood, R. K. S. (1967) Physiological Plant Pathology. Blackwell Scientific Publications, Oxford.Google Scholar

Further Reading

  1. Bos, L. (1970). Symptoms of Virus Diseases in Plants. PUDOC, Wageningen.Google Scholar
  2. Ogilvie, L. (1969). Diseases of Vegetables. Ministry of Agriculture, Fisheries and Food Bulletin No. 123. HMSO, London.Google Scholar
  3. Smith, K. M. (1977). Plant Viruses, 6th edn. Science Paperbacks, London.CrossRefGoogle Scholar
  4. Stapp, C. (1961). Bacterial Plant Pathogens. Oxford University Press, London.Google Scholar
  5. Walker, J. C. (1952). Diseases of Vegetable Crops. McGraw-Hill, New York.Google Scholar
  6. Wheeler, B. E. J. (1976). Diseases in Crops. Institute of Biology Studies in Biology no. 64. Edward Arnold, London.Google Scholar

Copyright information

© G. R. Dixon 1981

Authors and Affiliations

  • G. R. Dixon
    • 1
  1. 1.Head of Horticulture DivisionSchool of AgricultureAberdeenUK

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