scholarly journals Distribution, Pathogenicity, and Interactions of Two Strains of Rice yellow mottle virus in Forested and Savanna Zones of West Africa

Plant Disease ◽  
2001 ◽  
Vol 85 (1) ◽  
pp. 59-64 ◽  
Author(s):  
P. N'Guessan ◽  
A. Pinel ◽  
A. A. Sy ◽  
A. Ghesquière ◽  
D. Fargette
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Mottle Virus ◽  
Rice Yellow Mottle Virus ◽  
Yield Losses ◽  
The West ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Yellow Mottle ◽  
The Impact

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.

Field incidence of rice yellow mottle virus, genus sobemovirus on rice and a weed species in the field in Cote d'Ivoire

2002 ◽  
Vol 50 (1) ◽  
pp. 85-89 ◽  
Author(s):  
M. E. Abo ◽  
M. D. Alegbejo ◽  
A. A. Sy ◽  
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Sampling Period ◽  
Mottle Virus ◽  
Rice Yellow Mottle Virus ◽  
Weed Species ◽  
Cote D’Ivoire ◽  
Transplanted Rice ◽  
Côte D'ivoire ◽  
Yellow Mottle

Field surveys carried out between 1996 and 1997 in Cote d'Ivoire on weed hosts to detect the occurrence and subsistence of rice yellow mottle virus (RYMV) in nature show that rice and Echinochloa crus-pavonis (Link) harbour the virus. There was consistent detection of RYMV throughout the sampling period in rice samples mostly from the lowland varieties. It is thus evident that RYMV subsists more on rice in nature. This could serve as a source of inoculum for infection to newly transplanted rice in the field.

scholarly journals Impact of eight isolates of Rice Yellow Mottle Virus (RYMV) from Gagnoa (Côte d’Ivoire) on rice (Oryza sp) cultivars production

2016 ◽  
Vol 9 (5) ◽  
pp. 2459
Author(s):  
Dago Faustin Soko ◽  
Koutoua Ayolie ◽  
N’dodo Boni Clovis Koffi ◽  
Dolou Charlotte Tonessia ◽  
Yacouba Sere ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Mottle Virus ◽  
Rice Yellow Mottle Virus ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Yellow Mottle

scholarly journals Response of 20 Rice Genotypes to the Rice yellow mottle virus (RYMV) under Natural Infection Conditions in the M'bé Valley of Côte d'Ivoire

2019 ◽  
Vol 8 (12) ◽  
pp. 1-8
Author(s):  
Sorho Fatogoma ◽  
Guinagui Ndoua Bertrand ◽  
Bolou B. Bolou Antoine ◽  
Kone Nahoua ◽  
Kouassi Abou Bakari ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Natural Infection ◽  
Mottle Virus ◽  
Rice Yellow Mottle Virus ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Yellow Mottle ◽  
Rice Genotypes

scholarly journals Stunting among children under 3 years of age in Côte d’Ivoire: spatial and temporal variations between 1994 and 2011

2017 ◽  
Vol 20 (9) ◽  
pp. 1627-1639 ◽  
Author(s):  
Emmanuel Barankanira ◽  
Nicolas Molinari ◽  
Philippe Msellati ◽  
Christian Laurent ◽  
Kirsten A Bork
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
National Level ◽  
Scan Statistics ◽  
Demographic And Health Surveys ◽  
The West ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Geostatistical Approach ◽  
The Impact

AbstractObjectiveTo investigate spatial heterogeneity of stunting prevalence among children in Côte d’Ivoire and examine changes in stunting between 1994 and 2011, to assess the impact of the 2002–2011 civil war that led to temporary partitioning of the country.DesignData from 1994, 1998 and 2011 Côte d’Ivoire Demographic and Health Surveys (DHS) were analysed using a geostatistical approach taking into account spatial autocorrelation. Stunting data were interpolated using ordinary kriging; spatial clusters with high and low stunting prevalence were identified using Kulldorff spatial scan statistics. Multilevel multivariable logistic regression was then carried out, with year of survey as the main independent variable and an interaction term for time by geographic zone (Abidjan, South, North).SettingCôte d’Ivoire, West Africa.SubjectsChildren aged 0–35 months included in three DHS (n6709).ResultsOverall stunting prevalence was 30·7, 28·7 and 27·8 % in 1994, 1998 and 2011, respectively (P=0·32). Clusters with high prevalence were found in 1994 (in the West region,P<0·001) and 1998 (in the West and North-West regions,P<0·01 andP=0·01, respectively), but not in 2011. Abidjan was included in a cluster with low prevalence in all surveys (P<0·05). Risk of stunting did not change between 1994 and 2011 at national level (adjusted OR; 95 % CI: 1·39; 0·72, 2·64), but decreased in the South (0·74; 0·58, 0·94) and increased from 1998 to 2011 in Abidjan (1·96; 1·06, 3·64).ConclusionsIn Côte d’Ivoire, significant changes in stunting prevalence were observed at the sub-national level between 1994 and 2011.

Profile of migrants for cocoa production and agronomic characteristics of cocoa farms in Western Côte d'Ivoire

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
Keyword(s):  
Cote D'ivoire ◽  
Forest Cover ◽  
Côte D’Ivoire ◽  
The West ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Cocoa Production ◽  
Research Findings ◽  
Migrant Farmers ◽  
Cocoa Farmers

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.

Pteroteinon laufella.

2021 ◽  
Author(s):  
Matthew Cock
Keyword(s):  
Cote D'ivoire ◽  
Oil Palm ◽  
Côte D’Ivoire ◽  
Subsequent Development ◽  
Feeding Damage ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
The Impact

Abstract Writing about Zophopetes cerymica (which they considered more common) and P. laufella combined, Mariau and Morin (1974) state that attacks can be on palms of all ages, including young palms recently planted out. At this age, defoliation of the plants delays their subsequent development. Outbreaks on older trees are rarer, and the damage often less important; these attacks are generally localized at the edge of plantations. Mariau et al. (1981) add that the highest fronds are the most often damaged. Herder et al. (1994) refer to regular outbreaks of P. laufella on oil palm in southern Côte d'Ivoire. There are no more substantive reports on the impact of the feeding damage by these hesperiids.

scholarly journals Molecular evolution of Azagny virus, a newfound hantavirus harbored by the West African pygmy shrew (Crocidura obscurior) in Côte d'Ivoire

2011 ◽  
Vol 8 (1) ◽  
pp. 373 ◽  
Author(s):  
Hae Ji Kang ◽  
Blaise Kadjo ◽  
Sylvain Dubey ◽  
François Jacquet ◽  
Richard Yanagihara
Keyword(s):  
Molecular Evolution ◽  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
West African ◽  
The West ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
Pygmy Shrew

An assessment of the impact of artisanal and commercial gold mining on mercury and methylmercury levels in the environment and fish in Cote d'Ivoire

2019 ◽  
Vol 665 ◽  
pp. 1158-1167 ◽  
Author(s):  
Robert P. Mason ◽  
Zofia Baumann ◽  
Gunnar Hansen ◽  
Koffi Marcellin Yao ◽  
Mariame Coulibaly ◽  
...  
Keyword(s):  
Cote D'ivoire ◽  
Gold Mining ◽  
Côte D’Ivoire ◽  
Cote D’Ivoire ◽  
Côte D'ivoire ◽  
The Impact
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