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The roles of improved management practices to control coffee branch die-back in southwestern Ethiopia  [2004]

Taye, K., Ethiopian Agricultural Research Organization, Jimma Etiopia Anteneh, N., Ethiopian Agricultural Research Organization, Jimma Etiopia Alemseged, Y., Ethiopian Agricultural Research Organization, Jimma Etiopia

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Abstract
The novel coffee branch die-back is characterized by the black stripe formation on coffee branches while the leaves are still green. Although all the released coffee berry disease resistant selections and land race coffee types share the problem, the causative agent has not been properly identified. The severity of the problem depends, among others, on the levels of management inputs. Thís tríal has been undertaken with the objective to investigate the extent of different coffee management practices on the control of the novel coffee branch die-back. The study was made on established coffee trees at Jimma, Mettu and Tepi Research Centers, representing the major coffee growing areas of Ethiopia. Ten coffee trees per plot were used to sample fifteen primary and secondary branches of current year growth from which measurements on internode length, green and black partion of stem and exfoliated exoderms on orthotropic and plagiotropic branches were taken at a month intervals. In addition, the numbers of affected trees on a plot were counted and data were converted into percentage to quantify the degree of damage or recovery under each treatment. A randomized complete block design of three replicates was employed to analyze the most relevant parameters. Less trees affected by die-back and high exfoliation percent were associated with frequent clipping of couch grass), nitrogen and phosphorus fertilization, optimum shading or light interception not exceeding 50
percent and mulching practices. Furthermore, genetically strong coffee line of the open cultivar was less affected by the novel branch die-back as compared with the compact coffee types. Package cultural practices markedly reduced the severity of the problem over the piecemeal and control treatments. Less number of affected trees were noticed from optimum shade conditions at Jimma and Tepi. The syndrome differed due to branch ages where mean die-back was high on primary branches of tree as compared with the secondary branches. As a conclusion, the use improved management practices maintained ideal above-and below-ground plant parts and use of improved coffee cultivars by virtue of their impact on vigor could overcome the physiological disorder of coffee tree and promote sustainable yield.
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Other subjects

  • anthracnose
  • crop management
  • antracnosis
  • coffea
  • anthracnosis
  • enfermedades fungosas
  • conduite de la culture
  • fungal diseases
  • manejo del cultivo
  • maladie fongique

From the journal

Café Cacao

ISSN : 1680-7685

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