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A Survey Methodology for Assessing Yield Potential and Coffee Berry Losses in Peasant Coffee

Published online by Cambridge University Press:  03 October 2008

Gordon Browning  and
Andrew Dorward
Gordon Browning
Affiliation:
Institute of Horticultural Research, East Mailing, Maidstone, Kent, ME19 6BJ, England
Andrew Dorward
Affiliation:
Wye College, University of London, Ashford, Kent, TN25 5AH, England
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Summary

The effects of coffee berry disease (CBD) on yield are usually estimated by counting infected berries on marked branches throughout fruit development. This method is impractical when surveys are required of yield losses over large areas of extensively cultivated peasant coffee. A survey method is described for estimating yield potentials and the loss in yields due to severe CBD infection under such conditions. The method exploits the relation between numbers of flowering nodes and yield per tree, and requires a single subjective estimate of disease incidence on young expanding berries. Yield losses are estimated from the changes in this relation resulting from berry infection. Results are presented for peasant coffee at different stages of rehabilitation in Ethiopia. They indicate that the method is suitable for estimating.production in agronomic improvement projects and for identifying areas where CBD incidence might economically justify fungicide spraying.

Type
Research Article
Information
Experimental Agriculture , Volume 25 , Issue 2 , April 1989 , pp. 235 - 242
Copyright
Copyright © Cambridge University Press 1989

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References

REFERENCES

Anon. (1972). Jimma Research Station Progress Report, April 1971–March 1972. Addis Ababa: Institute of Agricultural Research.Google Scholar
Bishop, R. A., Browning, G. & Medland, J. (1986). Coffee improvement project, Ethiopia; Wye College Team Evaluation Report to DGVIII of the CEEC.Google Scholar
Browning, G. & Cannell, M. G. R. (1970). Use of 2-chloroethanephosphonic acid to promote the abscission and ripening of fruit of Coffea arabica. Journal of Horticultural Science 4:223–232.CrossRefGoogle Scholar
Cannell, M. G. R. (1973). Effects of irrigation, mulch and N-fertilisers on yield components of arabica coffee in Kenya. Experimental Agriculture 9:225–232.CrossRefGoogle Scholar
Hindorf, H. (1973). Colletotrichum-populztion auf Coffea arabica in Kenia II. Qualitative und quantitative Unterschiede in der Colletotrichum-population. Phytopathology Zeitschrift 77:216–234.CrossRefGoogle Scholar
Griffiths, E., Gibbs, J. N. & Waller, J. M. (1971). The control of coffee berry disease. Annals of Applied Biology 67:45–74.CrossRefGoogle Scholar
Mogk, H. (1973). Coffee berry disease. PhD thesis, University of Giessen.Google Scholar
Mulinge, S. K. (1970). Development of coffee berry disease in relation to the stage of berry growth. Annals of Applied Biology 65:269–276.CrossRefGoogle Scholar
Nutman, F. J. & Roberts, F. M. (1960). Coffee berry disease: epidemiology in relation to control. Experimental Agriculture 5:271–282.CrossRefGoogle Scholar
van der Graaff, N. A. (1978). Selection for resistance to coffee berry disease in arabica coffee in Ethiopia. Evaluation of selection methods. Netherlands Journal of Plant Pathology 84:205–215.CrossRefGoogle Scholar