Minotoring the Pathogenic Diversity of Xanthomonas axonopodis pv. manihotis Strains in Côte d’Ivoire, Sensitivity of Cassava Varieties and Disease-Control Approach

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Minotoring the Pathogenic Diversity of Xanthomonas axonopodis pv. manihotis Strains in Côte d’Ivoire, Sensitivity of Cassava Varieties and Disease-Control Approach

December 29, 2020 BIOLOGY 0

Background and Objective: In Côte d’Ivoire, cassava occupies a special role in human nutrition. Cassava (Manihot esculenta Crantz) allows people in Africa to ensure food security. In 2011, the world’s yield was estimated at 250 million tonnes. It is valued at 2.8 million tonnes per year in Côte d’Ivoire and is the second most important food crop following yam. However, its cultivation faces many parasitic restrictions, one of which is bacterial blight caused by Xanthomonas axonopodis pv, one of the most dreadful. It’s Manihotis. With the exception of its confirmation, no significant scientific knowledge on this disease and on the effective control methods was published in Côte d’Ivoire in 2015. The goal of this research is to study the pathogenic diversity of bacterial strains, the vulnerability of the key cultivars of cassava, and to evaluate the biopesticide NECO’s bactericidal properties. Materials and Methods: Xam strains were inoculated on 45-day-old plants and then treated with a selection of five (5) NECO concentrations (v/v). Results: Different sensitivity levels of the varieties as well as variability of the virulence were observed. 109 of the 121 Xam strains tested caused standard bacterial blight symptoms, while 12 strains proved to be avirulent. The ” Diarrassouba ” variety was the most affected, while ” Yavo ” and ” Bocou 2 ” reached the lowest degree of sensitivity. In addition, after two procedures, the application of NECO at 5 ml/L favoured the recovery of infected plants by 92.59 percent compared to 14.81 percent for the reference product. Conclusion: NECO can also be used in Côte d’Ivoire for its demonstrated effectiveness in the management of cassava bacterial blight. Despite NECO’s demonstrated efficacy, further field studies are required to evaluate the applicable doses based on parasite pressure, variety and climatic conditions.

Author(s) Details

Affery Arthur Martin
Unité de Formation et de Recherche (UFR) Biosciences, Laboratoire de Physiologie Végétale, Université Félix Houphouët-Boigny de Cocody-Abidjan, 22 B.P. 582 Abidjan 22, Côte d’Ivoire.

Abo Kouabenan
Département de Formation et de Recherche Agriculture et Ressources Animales (DFR-ARA), Laboratoire de Phytopathologie et de Biologie Végétale, Institut National Polytechnique Félix Houphouët-Boigny (INP-HB), BP 1313 Yamoussoukro, Côte-d’Ivoire.

N’guessan Aya Carine
Université Peleforo Gon Coulibaly Korhogo, UFR Sciences Biologiques, BP1328 Korhogo, Côte d’Ivoire.

Wonni Issa
Institut de l’Environnement et de Recherches Agricoles (INERA), BP 910, Bobo Dioulasso, Burkina Faso

Bomisso Edson Lézin
Unité de Formation et de Recherche (UFR) Biosciences, Laboratoire de Physiologie Végétale, Université Félix Houphouët-Boigny de Cocody-Abidjan, 22 B.P. 582 Abidjan 22, Côte d’Ivoire.

Kouamé Konan Didier
Unité de Formation et de Recherche (UFR) Biosciences, Laboratoire de Physiologie Végétale, Université Félix Houphouët-Boigny de Cocody-Abidjan, 22 B.P. 582 Abidjan 22, Côte d’Ivoire.

Tuo Seydou
Unité de Formation et de Recherche (UFR) Biosciences, Laboratoire de Physiologie Végétale, Université Félix Houphouët-Boigny de Cocody-Abidjan, 22 B.P. 582 Abidjan 22, Côte d’Ivoire.

Koné Mongomaké
Université Nangui Abrogoua, UFR Sciences de la Nature, Laboratoire de Biologie et Amélioration des Productions Végétales, 02 BP 801 Abidjan 02, Côte d’Ivoire.

Koné Daouda
Unité de Formation et de Recherche (UFR) Biosciences, Laboratoire de Physiologie Végétale, Université Félix Houphouët-Boigny de Cocody-Abidjan, 22 B.P. 582 Abidjan 22, Côte d’Ivoire.

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