caa a22 4500 386326312 CHVBK 20180307111653.0 cr unu---uuuuu 161130e198904 xx s 000 0 eng 10.1017/S0014479700016732 doi S0014479700016732 pii (NATIONALLICENCE)cambridge-10.1017/S0014479700016732 A Survey Methodology for Assessing Yield Potential and Coffee Berry Losses in Peasant Coffee [Elektronische Daten] 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. Copyright © Cambridge University Press 1989 Browning Gordon Institute of Horticultural Research, East Mailing, Maidstone, Kent, ME19 6BJ, England Dorward Andrew Wye College, University of London, Ashford, Kent, TN25 5AH, England Experimental Agriculture Cambridge University Press 25/2(1989-04), 235-242 0014-4797 25:2<235 1989 25 EAG https://doi.org/10.1017/S0014479700016732 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0014479700016732 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Browning Gordon Institute of Horticultural Research, East Mailing, Maidstone, Kent, ME19 6BJ, England NATIONALLICENCE 700 1- Dorward Andrew Wye College, University of London, Ashford, Kent, TN25 5AH, England NATIONALLICENCE 773 0- Experimental Agriculture Cambridge University Press 25/2(1989-04), 235-242 0014-4797 25:2<235 1989 25 EAG CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge