Spatiotemporal survey of multiple rice diseases in irrigated areas compared to rainfed lowlands in the western Burkina Faso

Barro Mariam, Kassankogno Abalo Itolou, Wonni Issa, Sérémé Drissa, Somda Irénée, Kabore Kouka Hilaire, Béna Gilles, Brugidou Christophe, Tharreau Didier, Tollenaere Charlotte. 2021. Spatiotemporal survey of multiple rice diseases in irrigated areas compared to rainfed lowlands in the western Burkina Faso. Plant Disease, 105 (12) : 3889-3899.

https://doi.org/10.1094/PDIS-03-21-0579-RE

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Quartile : Q1, Sujet : PLANT SCIENCES

Résumé : Multiple constraints affect rice yields and global production in West Africa. Among these constraints are viral, bacterial and fungal pathogens. We aimed to describe the spatiotemporal patterns of occurrence and incidence of multiple rice diseases in farmers' fields in contrasting rice growing systems in western Burkina Faso. For this purpose, we selected a set of three pairs of sites, each comprising an irrigated area and a neighboring rainfed lowland, and studied them over four consecutive years. We first performed interviews with the rice farmers to better characterize the management practices at the different sites. This study revealed that the transplanting of rice and the possibility of growing rice twice a year are restricted to irrigated areas, while other practices, such as the use of registered rice cultivars, fertilization and pesticides, are not specific but differ between the two rice growing systems. Then, we performed symptom observations at these study sites to monitor the following four diseases: yellow mottle disease, Bacterial Leaf Streak (BLS), rice leaf blast and brown spot. The infection rates were found to be higher in irrigated areas than in rainfed lowlands, both when analyzing all observed symptoms together (any of the four diseases) and when specifically considering each of the two diseases: BLS and rice leaf blast. Brown spot was particularly prevalent in all six study sites, while yellow mottle disease was particularly structured geographically. Various diseases were frequently found together in the same field (co-occurrence) or even on the same plant (coinfection), especially in irrigated areas.

Mots-clés Agrovoc : maladie des plantes, Enquête pathologique, surveillance épidémiologique, Xanthomonas oryzae pv. oryzicola, pyriculariose du riz, sobemovirus marbrure jaune riz, tache foliaire, programme d'irrigation, analyse spatiale

Mots-clés géographiques Agrovoc : Burkina Faso

Mots-clés complémentaires : Magnaporthe oryzae, Bipolaris oryzae, Riziculture

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

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

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