[ Les effets de la Mosaïque Africaine du Manioc à Kindu et ses environs (RD Congo) ]
Volume 26, Issue 2, May 2019, Pages 445–456
Martin MUTUZA BAKUZEZIA1
1 ISEA-Maniema, ISP-Kibombo, ISDR-Kindu, Université de Kindu, RD Congo
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The African Mosaic of the Cassava is a disease caused by a geminivirus transmitted by the white fly (Bemisia tabaci) in the intertropical zone. This virus contributes to significant drops of the output of the cassava in several African countries, of which the Democratic republic of Congo, where the reduction in the production would be currently allotted to him. For better appreciating the importance of its effects, a study was conducted on fields of cassava to Kindu and its hinterlands in the province of Maniema as a Democratic republic of Congo of 2017-2018. Parameters related to the disease (the incidence, the foliar rate of attacks, the index of gravity of the symptoms and the loss of output) were studied. The study carried out with Kindu showed an average incidence of the disease of 72.26% and one average rate of foliar attack of 75.41%. For the other sites/localities retained the incidences of the disease varied from 91.7% (Mikonde Pk5); 86.6% (Kampala Pk 11); 83.28% (Katako Pk7); 74.62% (Shenge Pk4); 73.38% (Lukungu Pk7) with 38.04% (Lwama Pk7), whereas the rate of foliar attack of the sick seedlings by sites varied from 85.48% to 53% is an average of 72%. In addition, 74.6% of the seedlings studied expressed the disease. Sick seedlings have IGS (Index of Gravity of the Symptoms) worrying (2 to 5), likely cause a drop in the production in the studied zones. The economic impact of the African mosaic resulted in a loss of output at the level of the tubers reducing to a significant degree the efforts of the country farmers. The results got in this study show a relatively worrying situation clearly, deserving a constant intervention. The characterization of the virus, the agronomic research and the creation of the new varieties of cassava tolerant and/or resistant to the African mosaic would prove to be essential.
Author Keywords: African mosaic, Disease of the Cassava, Lower output, Propagation of pandemic, IGS (Index of Gravity of the Symptoms).
Volume 26, Issue 2, May 2019, Pages 445–456
Martin MUTUZA BAKUZEZIA1
1 ISEA-Maniema, ISP-Kibombo, ISDR-Kindu, Université de Kindu, RD Congo
Original language: French
Copyright © 2019 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The African Mosaic of the Cassava is a disease caused by a geminivirus transmitted by the white fly (Bemisia tabaci) in the intertropical zone. This virus contributes to significant drops of the output of the cassava in several African countries, of which the Democratic republic of Congo, where the reduction in the production would be currently allotted to him. For better appreciating the importance of its effects, a study was conducted on fields of cassava to Kindu and its hinterlands in the province of Maniema as a Democratic republic of Congo of 2017-2018. Parameters related to the disease (the incidence, the foliar rate of attacks, the index of gravity of the symptoms and the loss of output) were studied. The study carried out with Kindu showed an average incidence of the disease of 72.26% and one average rate of foliar attack of 75.41%. For the other sites/localities retained the incidences of the disease varied from 91.7% (Mikonde Pk5); 86.6% (Kampala Pk 11); 83.28% (Katako Pk7); 74.62% (Shenge Pk4); 73.38% (Lukungu Pk7) with 38.04% (Lwama Pk7), whereas the rate of foliar attack of the sick seedlings by sites varied from 85.48% to 53% is an average of 72%. In addition, 74.6% of the seedlings studied expressed the disease. Sick seedlings have IGS (Index of Gravity of the Symptoms) worrying (2 to 5), likely cause a drop in the production in the studied zones. The economic impact of the African mosaic resulted in a loss of output at the level of the tubers reducing to a significant degree the efforts of the country farmers. The results got in this study show a relatively worrying situation clearly, deserving a constant intervention. The characterization of the virus, the agronomic research and the creation of the new varieties of cassava tolerant and/or resistant to the African mosaic would prove to be essential.
Author Keywords: African mosaic, Disease of the Cassava, Lower output, Propagation of pandemic, IGS (Index of Gravity of the Symptoms).
Abstract: (french)
La Mosaïque Africaine du Manioc est une maladie causée par un geminivirus transmis par la mouche blanche (Bemisia tabaci) dans la zone intertropicale. Ce virus contribue à une baisse importante du rendement du manioc dans plusieurs pays africains, dont la République Démocratique du Congo, où la diminution de la production lui serait actuellement attribuée. Pour mieux apprécier l’importance de ses effets, une étude a été menée sur des champs de manioc à Kindu et ses hinterlands dans la province du Maniema en République Démocratique du Congo de 2017-2018. Des paramètres liés à la maladie (l’incidence, le taux d’attaques foliaires, l’indice de gravité des symptômes et la perte de rendement) ont été étudiés. L’étude réalisée à Kindu a montré une incidence moyenne de la maladie de 72,26% et un taux moyen d’attaque foliaire de 75,41%. Pour les autres sites/localités retenus les incidences de la maladie ont varié de 91,7% (Mikonde Pk5) ; 86,6% (Kampala Pk11) ; 83,28% (Katako Pk7) ; 74,62% (Shenge Pk4) ; 73,38% (Lukungu Pk7) à 38,04% (Lwama Pk7), alors que le taux d’attaque foliaire des plants malades par sites a varié de 85,48% à 53% soit une moyenne de 72%. Par ailleurs, 74,6% des plants étudiées ont manifesté la maladie. Des plants malades ont des IGS (Indice de Gravité des Symptômes) inquiétants (2 à 5), susceptibles de faire baisser la production dans les zones étudiées. L’impact économique de la mosaïque africaine s’est traduit par une perte de rendement au niveau des tubercules réduisant de façon significative les efforts des paysans cultivateurs. Les résultats obtenus dans cette étude montrent clairement une situation relativement inquiétante, méritant une intervention soutenue. La caractérisation du virus, la recherche agronomiques et la création des nouvelles variétés de manioc tolérantes et/ou résistantes à la mosaïque africaine s’avèreraient indispensables.
Author Keywords: Mosaïque africaine, Maladie du Manioc, Baisse de rendement, Propagation de la pandémie, IGS (Indice de Gravité des Symptômes).
How to Cite this Article
Martin MUTUZA BAKUZEZIA, “The impact of African cassava mosaic in Kindu and its surroundings (DR Congo),” International Journal of Innovation and Applied Studies, vol. 26, no. 2, pp. 445–456, May 2019.
