[ Evaluation de l’impact de la mosaïque africaine sur le rendement en racines fraîches du manioc à l’Est de la République Démocratique du Congo ]
Volume 34, Issue 1, October 2021, Pages 32–37
Ugentho Ukany Henri1, Munganga-wa-Muhwandju Romain2, Musungayi Mpongolo Eric3, Clérisse M. Casinga4, and Bashizi Kalinga Benoît5
1 Institut National pour l’Etude et la Recherche Agronomiques, BP 2037Kinshasa 1, Centre de Recherche de Mulungu, RD Congo
2 Institut National pour l’Etude et la Recherche Agronomiques (INERA), BP 2037 Kinshasa 1, Centre de Recherche de Mulungu, RD Congo
3 Institut National pour l’Etude et la Recherche Agronomiques, BP 2037Kinshasa 1, Centre de Recherche de Mulungu, RD Congo
4 Faculté des sciences agronomiques et environnement, Université Evangélique en Afrique, Bukavu, South Kivu, RD Congo
5 Institut International d’Agriculture Tropicale, Station de Kalambo, Bukavu, RD Congo
Original language: French
Copyright © 2021 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.
Cassava is the main food crop grown in all provinces of the Democratic Republic of Congo. Increasing its productivity therefore comes up against multiple constraints, including diseases, in particular the endemic form of the mosaic, which occupies a prominent place. Small farmers who are the main producers remain much attached to local varieties although research regularly develops and disseminates improved varieties resistant to the African cassava mosaic. The objective of the study we conducted was, on the one hand, to assess the real yields of the resistant varieties disseminated and of the most widely cultivated local variety and, on the other hand, to determine the rate of loss of production of the variety. Local compared to varieties improved in distribution. The trial, set up with the active participation of the peasantry, included 4 repetitions in 4 different sites, near the peasants' fields. Four treatments consist of 4 varieties including 3 improved and 1 local. Cuttings taken from plants without disease symptoms are planted at 1mx1m spacing’s and harvesting took place 12 months after planting. The recovery was observed 1 month after planting, while data on diseases and pests are taken from the third month of planting until harvest at 3-month intervals. The results obtained show that the severity and incidence of the mosaic were higher on the local variety than on the improved varieties, one of which was shown to be somewhat susceptible to the disease. The loss of production of the local variety is estimated at plus or minus 50% compared to the average yield of the improved varieties.
Author Keywords: Impact, mosaic, yield, fresh roots.
Volume 34, Issue 1, October 2021, Pages 32–37
Ugentho Ukany Henri1, Munganga-wa-Muhwandju Romain2, Musungayi Mpongolo Eric3, Clérisse M. Casinga4, and Bashizi Kalinga Benoît5
1 Institut National pour l’Etude et la Recherche Agronomiques, BP 2037Kinshasa 1, Centre de Recherche de Mulungu, RD Congo
2 Institut National pour l’Etude et la Recherche Agronomiques (INERA), BP 2037 Kinshasa 1, Centre de Recherche de Mulungu, RD Congo
3 Institut National pour l’Etude et la Recherche Agronomiques, BP 2037Kinshasa 1, Centre de Recherche de Mulungu, RD Congo
4 Faculté des sciences agronomiques et environnement, Université Evangélique en Afrique, Bukavu, South Kivu, RD Congo
5 Institut International d’Agriculture Tropicale, Station de Kalambo, Bukavu, RD Congo
Original language: French
Copyright © 2021 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
Cassava is the main food crop grown in all provinces of the Democratic Republic of Congo. Increasing its productivity therefore comes up against multiple constraints, including diseases, in particular the endemic form of the mosaic, which occupies a prominent place. Small farmers who are the main producers remain much attached to local varieties although research regularly develops and disseminates improved varieties resistant to the African cassava mosaic. The objective of the study we conducted was, on the one hand, to assess the real yields of the resistant varieties disseminated and of the most widely cultivated local variety and, on the other hand, to determine the rate of loss of production of the variety. Local compared to varieties improved in distribution. The trial, set up with the active participation of the peasantry, included 4 repetitions in 4 different sites, near the peasants' fields. Four treatments consist of 4 varieties including 3 improved and 1 local. Cuttings taken from plants without disease symptoms are planted at 1mx1m spacing’s and harvesting took place 12 months after planting. The recovery was observed 1 month after planting, while data on diseases and pests are taken from the third month of planting until harvest at 3-month intervals. The results obtained show that the severity and incidence of the mosaic were higher on the local variety than on the improved varieties, one of which was shown to be somewhat susceptible to the disease. The loss of production of the local variety is estimated at plus or minus 50% compared to the average yield of the improved varieties.
Author Keywords: Impact, mosaic, yield, fresh roots.
Abstract: (french)
Le manioc est la principale culture vivrière cultivée dans toutes les provinces de la République Démocratique du Congo. L’augmentation de sa productivité se heurte dès lors à des multiples contraintes parmi lesquelles, les maladies notamment la forme endémique de la mosaïque qui occupe une place de choix. Les petits paysans qui sont les principaux producteurs restent très attachés aux variétés locales bien que la recherche mette au point et diffuse régulièrement les variétés améliorées résistantes à la mosaïque africaine du manioc. L’étude que nous avons conduite avait pour objectif d’une part, d’évaluer les rendements réels des variétés résistantes diffusées et de la variété locale la plus cultivée et d’autre part, de déterminer le taux de perte de production de la variété locale par rapport aux variétés améliorées en diffusion. L’essai installé avec la participation active paysanne, comportait 4 répétitions réparties dans 4 sites différents, à proximité des champs des paysans. Quatre traitements sont constitués par 4 variétés dont 3 améliorées et 1 locale. Les boutures prélevées sur les plants sans symptôme des maladies sont plantées aux écartements de 1mx1m et la récolte est intervenue 12 mois après plantation. La reprise a été observée à 1 mois après plantation, alors que les données sur les maladies et ravageurs sont prise à partir du troisième mois de la plantation jusqu’à la récolte à 3 mois d’intervalle. Il ressort des résultats obtenus que, la sévérité et l’incidence de la mosaïque fussent les plus élevées sur la variété locale que sur les variétés améliorées dont l’une s’est montrée un peu sensible à la maladie. La perte de production de la variété locale est évaluée à plus ou moins 50 % par rapport à la moyenne de rendement des variétés améliorées.
Author Keywords: Impact, mosaïque, rendement, racines fraiches.
How to Cite this Article
Ugentho Ukany Henri, Munganga-wa-Muhwandju Romain, Musungayi Mpongolo Eric, Clérisse M. Casinga, and Bashizi Kalinga Benoît, “Evaluation of the impact of cassava mosaic disease on the yield of fresh cassava roots in the East of Democratic Republic of Congo,” International Journal of Innovation and Applied Studies, vol. 34, no. 1, pp. 32–37, October 2021.
