scholarly journals Genetic Diversity of Simulium damnosum complex Onchocerciasis Vector and its Influence on Entomological Monitoring in the West of Côte d'Ivoire

2019 ◽  
Vol 15 (36) ◽  
Author(s):  
Siriki Simaro ◽  
Mathurin Koffi ◽  
Mahama Toure ◽  
Bernardin Ahouty ◽  
Ibrahim Konate ◽  
...  
2021 ◽  
Vol 3 (1) ◽  
pp. 051-062
Author(s):  
Kpangui Kouassi Bruno ◽  
Sangne Yao Charles ◽  
Kouakou Kouassi Apollinaire ◽  
Koua Kadio Attey Noël ◽  
Koffi N'Guessan Achille

The mountainous relief of the West of Côte d'Ivoire and the large savannahs next to forests didn’t make this zone very excellent for cocoa production. However, for the last decade, an important influx of farming population has been observed in this area. The objective of this study is to analyze the dynamics of the settlement of migrant farmers in the West region of Côte d’Ivoire, using the department of Biankouma as a case of study. So, individual surveys were conducted among 203 cocoa farmers from 15 villages in the department of Biankouma, who had migrated to this region, It was found that the majority of these farmers are natives of Côte d'Ivoire (38.3%) and non-natives (33.5%) from countries in the West Africa region. The migratory flow to this region is mainly internal, with 95.6% of farmers coming from 11 Districts and 55 localities in the country. While initially (i.e., before 1985), farmers came from towns near Duékoué (11.8%), these waves of movement from towns in neighboring districts (Bas-Sassandra and Sassandra-Marahoué) to the Western Region will experience their highest rates between 2002 and 2013. Observations drawn from our research findings support the hypothesis that the political-military crisis that the country has experienced has accentuated migratory flows of farmers for cocoa production in western Côte d'Ivoire and these migratory flows could be the cause of the degradation of forest cover in the Biankouma Department.


2011 ◽  
Vol 8 (1) ◽  
pp. 373 ◽  
Author(s):  
Hae Ji Kang ◽  
Blaise Kadjo ◽  
Sylvain Dubey ◽  
François Jacquet ◽  
Richard Yanagihara

2013 ◽  
Vol 12 (1) ◽  
pp. 419 ◽  
Author(s):  
Sarah E Mara ◽  
Kigbafori D Silué ◽  
Giovanna Raso ◽  
Simon P N’Guetta ◽  
Eliézer K N’Goran ◽  
...  

Plant Disease ◽  
2001 ◽  
Vol 85 (1) ◽  
pp. 59-64 ◽  
Author(s):  
P. N'Guessan ◽  
A. Pinel ◽  
A. A. Sy ◽  
A. Ghesquière ◽  
D. Fargette

In Côte d'Ivoire, the S2 strain of Rice yellow mottle virus (RYMV) predominated in the forested zones, including the “rice belt” to the west, in each of the cropping systems where rice was grown. The S1 strain occurred more frequently in the northern Guinean savanna, and only S1 isolates were found further north in the Sahelo-Soudanian zones. In mixed infection, S2 dominated over S1 both in viral capsid and RNA contents under temperature regimes encompassing those observed in savanna and forested zones of Côte d'Ivoire. There was no evidence of interactions in virus accumulation between the West African strains S1 or S2 with the more distantly related East African strain S4. Field trials emphasized the impact of RYMV, which induced yield losses of 40 to 60% in several widely grown cultivars of Oryza sativa indica and O. sativa japonica. We report the high resistance of the O. indica cv. Gigante under field conditions which was apparent with all the S1 and S2 isolates tested. Responses to RYMV infection of several cultivars were isolate dependent. With most differential cultivars, responses were not strain specific, with the exception of the O. japonica cv. Idsa6, in which the S2 isolates always induced higher yield losses than the S1 isolates.


2017 ◽  
Vol 13 (3) ◽  
pp. 112
Author(s):  
Kouablan Edmond Koffi ◽  
Saraka Didier Martial Yao ◽  
Nafan Diarrassouba ◽  
Laopé Ambroise Casimir Siene

The survey aims at assessing current managing status of organizations involves in the conservation of local genetic diversity of rice, maize, sorghum and pearl millet in seedbanks located in northern Côte d’Ivoire. An investigation was conducted with 100 respondents in charge of cereal seedbanks managing from Ferkessedougou and Ouangolodougou areas. The results at regional scale revealed two co-existing informal and formal systems for seedbanks management in these areas. The farmers’ seedbanks system or informal system was the main source of cereal seed supply for farmers and more important than the national or formal seedbank system. Only, farmers’ seedbanks of two crops, rice and maize were found in visited localities. The management of these farmers’ seedbanks was enabled by associations or cooperatives gathering more men (78.27%) than women (21.73%). Ninety percent (90%) of respondents were identified as saving 1 to 3 traditional varieties of cereal in these seedbanks managed by farmers in the studied region. The reveled difficulties in the farmers’ seedbanks management appeared mainly as informally organized seed system that must be a complementary approach to formal system or national seed system for genetic diversity preservation of local cereal varieties and also as a distribution channel of improved cereal varieties.


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