Spatial and temporal analysis of coffee wilt disease caused by Fusarium xylarioides in Coffea canephora

Musoli Chungason Pascal, Pinard Fabrice, Charrier André, Kangire Africano, Ten Hoopen Gerben Martijn, Kabole C., Ogwang J., Bieysse Daniel, Cilas Christian. 2008. Spatial and temporal analysis of coffee wilt disease caused by Fusarium xylarioides in Coffea canephora. European Journal of Plant Pathology, 122 (4) : 451-460.

Résumé : Coffee wilt disease (CWD) caused by Fusarium xylarioides, considered to be a soil-inhabiting fungus, is endemic in several African countries, affecting commercially important coffee species and causing serious economic losses. Coffee wilt disease development in naturally infected Coffea canephora fields at the Coffee Research Institute in Uganda was assessed from April 2001 to March 2006 to generate information about temporal and spatial spread of the disease. Maps of diseased trees were also generated from the data. Semi-variance analysis was performed on the data to show the spatio-temporal structure of disease. Host influence on the spatio-temporal structure was deduced from the distribution pattern of diseased and healthy trees and analysis of variance. Results show that the temporal disease epidemic progress was slow. The disease was found to spread from initial infections to healthy neighbouring trees, resulting in an aggregated pattern. An infected tree could infect up to three healthy trees away, in any direction. Disease foci formed and expanded with time, coalescing but punctuated in spots planted with resistant hosts. There were varying levels of susceptibility among host genotypes, affecting the rates and levels of epidemic development. The implications of the findings to the control of CWD are discussed.

Mots-clés Agrovoc : Coffea canephora, Gibberella, Fusarium, épidémiologie, transmission des maladies, génotype

Mots-clés géographiques Agrovoc : Ouganda

Mots-clés complémentaires : Fusarium xylarioides

Classification Agris : H20 - Maladies des plantes

Champ stratégique Cirad : Axe 1 (2005-2013) - Intensification écologique

Auteurs et affiliations

• Musoli Chungason Pascal, NARO (UGA)
• Pinard Fabrice, CIRAD-BIOS-UPR Bioagresseurs de pérennes (KEN)
• Charrier André, ENSAM [Ecole nationale supérieure agronomique de Montpellier] (FRA)
• Kangire Africano, CRI (UGA)
• Ten Hoopen Gerben Martijn, CIRAD-BIOS-UPR Bioagresseurs de pérennes (CMR) ORCID: 0000-0003-2133-3130
• Kabole C., CRI (UGA)
• Ogwang J., CRI (UGA)
• Bieysse Daniel, CIRAD-BIOS-UMR BGPI (FRA)
• Cilas Christian, CIRAD-BIOS-UPR Bioagresseurs de pérennes (FRA)

Source : Cirad - Agritrop (https://agritrop.cirad.fr/546810/)

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