Effect of shade on Arabica Coffee Berry Disease development toward an agroforestry system to reduce disease impact

Mouen Bedimo Joseph Aubert, Njiayouom Ibrahim, Bieysse Daniel, Ndoumbè Nkeng Michel, Cilas Christian, Nottéghem Jean-Loup. 2008. Effect of shade on Arabica Coffee Berry Disease development toward an agroforestry system to reduce disease impact. Phytopathology, 98 (12) : 1320-1325.

https://doi.org/10.1094/PHYTO-98-12-1320

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Liste HCERES des revues (en SHS) : oui

Thème(s) HCERES des revues (en SHS) : Psychologie-éthologie-ergonomie

Résumé : Coffee berry disease (CBD), caused by Colletotrichum kahawae, is a major constraint for Arabica coffee cultivation in Africa. The disease is specific to green berries and can lead to 60% harvest losses. In Cameroon, mixed cropping systems of coffee with other crops, such as fruit trees, are very widespread agricultural practices. Fruit trees are commonly planted at random on coffee farms, providing a heterogeneous shading pattern for coffee trees growing underneath. Based on a recent study of CBD, it is known that those plants can reduce disease incidence. To assess the specific effect of shade, in situ and in vitro disease development was compared between coffee trees shaded artificially by a net and trees located in full sunlight. In the field, assessments confirmed a reduction in CBD on trees grown under shade compared with those grown in full sunlight. Artificial inoculations in the laboratory showed that shade did not have any effect on the intrinsic susceptibility of coffee berries to CBD. Coffee shading mainly acts on environmental parameters in limiting disease incidence. In addition to reducing yield losses, agroforestry system may also be helpful in reducing chemical control of the disease and in diversifying coffee growers' incomes.

Mots-clés Agrovoc : Coffea arabica, Colletotrichum, agroforesterie, système de culture, ombrage, contrôle de maladies, épidémiologie

Mots-clés géographiques Agrovoc : Cameroun

Mots-clés complémentaires : Colletotrichum kahawae

Classification Agris : H20 - Maladies des plantes
F08 - Systèmes et modes de culture
K10 - Production forestière

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

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