PSR

La connaissance de la dynamique de l'agrobiodiversité est nécessaire pour percevoir les évolutions néfastes de l'érosion génétique et entreprendre des stratégies de conservation. L'objectif du présent travail a été d'étudier la variabilité phénotypique des accessions et leur structuration sur la base de 24 variables. Quarantequatre accessions de manioc ont été collectées dans différentes zones de production de la Côte d'Ivoire. La description des différentes accessions (variables qualitatives) et la mesure des paramètres agronomiques (variables quantitatives) ont permis d'établir une classific...

La connaissance de la dynamique de l'agrobiodiversité est nécessaire pour percevoir les évolutions néfastes de l'érosion génétique et entreprendre des stratégies de conservation. L'objectif du présent travail a été d'étudier la variabilité phénotypique des accessions et leur structuration sur la base de 24 variables. Quarantequatre accessions de manioc ont été collectées dans différentes zones de production de la Côte d'Ivoire. La description des différentes accessions (variables qualitatives) et la mesure des paramètres agronomiques (variables quantitatives) ont permis d'établir une classific...

La connaissance de la dynamique de l'agrobiodiversité est nécessaire pour percevoir les évolutions néfastes de l'érosion génétique et entreprendre des stratégies de conservation. L'objectif du présent travail a été d'étudier la variabilité phénotypique des accessions et leur structuration sur la base de 24 variables. Quarantequatre accessions de manioc ont été collectées dans différentes zones de production de la Côte d'Ivoire. La description des différentes accessions (variables qualitatives) et la mesure des paramètres agronomiques (variables quantitatives) ont permis d'établir une classific...

La connaissance de la dynamique de l'agrobiodiversité est nécessaire pour percevoir les évolutions néfastes de l'érosion génétique et entreprendre des stratégies de conservation. L'objectif du présent travail a été d'étudier la variabilité phénotypique des accessions et leur structuration sur la base de 24 variables. Quarantequatre accessions de manioc ont été collectées dans différentes zones de production de la Côte d'Ivoire. La description des différentes accessions (variables qualitatives) et la mesure des paramètres agronomiques (variables quantitatives) ont permis d'établir une classific...

La connaissance de la dynamique de l'agrobiodiversité est nécessaire pour percevoir les évolutions néfastes de l'érosion génétique et entreprendre des stratégies de conservation. L'objectif du présent travail a été d'étudier la variabilité phénotypique des accessions et leur structuration sur la base de 24 variables. Quarantequatre accessions de manioc ont été collectées dans différentes zones de production de la Côte d'Ivoire. La description des différentes accessions (variables qualitatives) et la mesure des paramètres agronomiques (variables quantitatives) ont permis d'établir une classific...

La connaissance de la dynamique de l'agrobiodiversité est nécessaire pour percevoir les évolutions néfastes de l'érosion génétique et entreprendre des stratégies de conservation. L'objectif du présent travail a été d'étudier la variabilité phénotypique des accessions et leur structuration sur la base de 24 variables. Quarantequatre accessions de manioc ont été collectées dans différentes zones de production de la Côte d'Ivoire. La description des différentes accessions (variables qualitatives) et la mesure des paramètres agronomiques (variables quantitatives) ont permis d'établir une classific...

La connaissance de la dynamique de l'agrobiodiversité est nécessaire pour percevoir les évolutions néfastes de l'érosion génétique et entreprendre des stratégies de conservation. L'objectif du présent travail a été d'étudier la variabilité phénotypique des accessions et leur structuration sur la base de 24 variables. Quarantequatre accessions de manioc ont été collectées dans différentes zones de production de la Côte d'Ivoire. La description des différentes accessions (variables qualitatives) et la mesure des paramètres agronomiques (variables quantitatives) ont permis d'établir une classific...

Background and Objective: An assessment trial on the behavior of five varieties of banana and plantain cultivars under natural infestation by Mycosphaerella fijiensis was carried out in Azaguié-Ahoua in Southern Côte dʼIvoire, in 2013 and repeated in 2014 for selecting varieties that are productive and tolerant to Black Sigatoka (BLSD).Methodology: The trial was set up in split-plot with three repetitions.The banana tree suckers were planted, with a density of 1,600 plants per hectare, that is a spacing of 2.5 and over 2.5 m.In the 4th month after planting, observations and measurements focuse...

Background and Objective: An assessment trial on the behavior of five varieties of banana and plantain cultivars under natural infestation by Mycosphaerella fijiensis was carried out in Azaguié-Ahoua in Southern Côte dʼIvoire, in 2013 and repeated in 2014 for selecting varieties that are productive and tolerant to Black Sigatoka (BLSD).Methodology: The trial was set up in split-plot with three repetitions.The banana tree suckers were planted, with a density of 1,600 plants per hectare, that is a spacing of 2.5 and over 2.5 m.In the 4th month after planting, observations and measurements focuse...

Background and Objective: An assessment trial on the behavior of five varieties of banana and plantain cultivars under natural infestation by Mycosphaerella fijiensis was carried out in Azaguié-Ahoua in Southern Côte dʼIvoire, in 2013 and repeated in 2014 for selecting varieties that are productive and tolerant to Black Sigatoka (BLSD).Methodology: The trial was set up in split-plot with three repetitions.The banana tree suckers were planted, with a density of 1,600 plants per hectare, that is a spacing of 2.5 and over 2.5 m.In the 4th month after planting, observations and measurements focuse...

Background and Objective: An assessment trial on the behavior of five varieties of banana and plantain cultivars under natural infestation by Mycosphaerella fijiensis was carried out in Azaguié-Ahoua in Southern Côte dʼIvoire, in 2013 and repeated in 2014 for selecting varieties that are productive and tolerant to Black Sigatoka (BLSD).Methodology: The trial was set up in split-plot with three repetitions.The banana tree suckers were planted, with a density of 1,600 plants per hectare, that is a spacing of 2.5 and over 2.5 m.In the 4th month after planting, observations and measurements focuse...

Background and Objective: An assessment trial on the behavior of five varieties of banana and plantain cultivars under natural infestation by Mycosphaerella fijiensis was carried out in Azaguié-Ahoua in Southern Côte dʼIvoire, in 2013 and repeated in 2014 for selecting varieties that are productive and tolerant to Black Sigatoka (BLSD).Methodology: The trial was set up in split-plot with three repetitions.The banana tree suckers were planted, with a density of 1,600 plants per hectare, that is a spacing of 2.5 and over 2.5 m.In the 4th month after planting, observations and measurements focuse...

Background and Objective: An assessment trial on the behavior of five varieties of banana and plantain cultivars under natural infestation by Mycosphaerella fijiensis was carried out in Azaguié-Ahoua in Southern Côte dʼIvoire, in 2013 and repeated in 2014 for selecting varieties that are productive and tolerant to Black Sigatoka (BLSD).Methodology: The trial was set up in split-plot with three repetitions.The banana tree suckers were planted, with a density of 1,600 plants per hectare, that is a spacing of 2.5 and over 2.5 m.In the 4th month after planting, observations and measurements focuse...

Background and Objective: An assessment trial on the behavior of five varieties of banana and plantain cultivars under natural infestation by Mycosphaerella fijiensis was carried out in Azaguié-Ahoua in Southern Côte dʼIvoire, in 2013 and repeated in 2014 for selecting varieties that are productive and tolerant to Black Sigatoka (BLSD).Methodology: The trial was set up in split-plot with three repetitions.The banana tree suckers were planted, with a density of 1,600 plants per hectare, that is a spacing of 2.5 and over 2.5 m.In the 4th month after planting, observations and measurements focuse...

Background and Objective: An assessment trial on the behavior of five varieties of banana and plantain cultivars under natural infestation by Mycosphaerella fijiensis was carried out in Azaguié-Ahoua in Southern Côte dʼIvoire, in 2013 and repeated in 2014 for selecting varieties that are productive and tolerant to Black Sigatoka (BLSD).Methodology: The trial was set up in split-plot with three repetitions.The banana tree suckers were planted, with a density of 1,600 plants per hectare, that is a spacing of 2.5 and over 2.5 m.In the 4th month after planting, observations and measurements focuse...

La recherche de matières premières alternatives pour la production de biopesticides microbiens suscite beaucoup d’intérêts. La présente étude s’est proposée d’utiliser le broyat de péricarpes des cabosses de cacao comme substrat de fermentation pour produire Bacillus thuringiensis var. kurstaki HD-1 (Btk HD-1). Les échantillons de péricarpes des cabosses ont été collectés dans une plantation cacaoyère de Toumokro à Yamoussoukro en Côte d’Ivoire. Les paramètres physico-chimiques ont été déterminés selon les méthodes standards. Le substrat de fermentation a été autoclavé, 2 fois successivement,...

La recherche de matières premières alternatives pour la production de biopesticides microbiens suscite beaucoup d’intérêts. La présente étude s’est proposée d’utiliser le broyat de péricarpes des cabosses de cacao comme substrat de fermentation pour produire Bacillus thuringiensis var. kurstaki HD-1 (Btk HD-1). Les échantillons de péricarpes des cabosses ont été collectés dans une plantation cacaoyère de Toumokro à Yamoussoukro en Côte d’Ivoire. Les paramètres physico-chimiques ont été déterminés selon les méthodes standards. Le substrat de fermentation a été autoclavé, 2 fois successivement,...

La recherche de matières premières alternatives pour la production de biopesticides microbiens suscite beaucoup d’intérêts. La présente étude s’est proposée d’utiliser le broyat de péricarpes des cabosses de cacao comme substrat de fermentation pour produire Bacillus thuringiensis var. kurstaki HD-1 (Btk HD-1). Les échantillons de péricarpes des cabosses ont été collectés dans une plantation cacaoyère de Toumokro à Yamoussoukro en Côte d’Ivoire. Les paramètres physico-chimiques ont été déterminés selon les méthodes standards. Le substrat de fermentation a été autoclavé, 2 fois successivement,...

La recherche de matières premières alternatives pour la production de biopesticides microbiens suscite beaucoup d’intérêts. La présente étude s’est proposée d’utiliser le broyat de péricarpes des cabosses de cacao comme substrat de fermentation pour produire Bacillus thuringiensis var. kurstaki HD-1 (Btk HD-1). Les échantillons de péricarpes des cabosses ont été collectés dans une plantation cacaoyère de Toumokro à Yamoussoukro en Côte d’Ivoire. Les paramètres physico-chimiques ont été déterminés selon les méthodes standards. Le substrat de fermentation a été autoclavé, 2 fois successivement,...

La recherche de matières premières alternatives pour la production de biopesticides microbiens suscite beaucoup d’intérêts. La présente étude s’est proposée d’utiliser le broyat de péricarpes des cabosses de cacao comme substrat de fermentation pour produire Bacillus thuringiensis var. kurstaki HD-1 (Btk HD-1). Les échantillons de péricarpes des cabosses ont été collectés dans une plantation cacaoyère de Toumokro à Yamoussoukro en Côte d’Ivoire. Les paramètres physico-chimiques ont été déterminés selon les méthodes standards. Le substrat de fermentation a été autoclavé, 2 fois successivement,...

La recherche de matières premières alternatives pour la production de biopesticides microbiens suscite beaucoup d’intérêts. La présente étude s’est proposée d’utiliser le broyat de péricarpes des cabosses de cacao comme substrat de fermentation pour produire Bacillus thuringiensis var. kurstaki HD-1 (Btk HD-1). Les échantillons de péricarpes des cabosses ont été collectés dans une plantation cacaoyère de Toumokro à Yamoussoukro en Côte d’Ivoire. Les paramètres physico-chimiques ont été déterminés selon les méthodes standards. Le substrat de fermentation a été autoclavé, 2 fois successivement,...

La recherche de matières premières alternatives pour la production de biopesticides microbiens suscite beaucoup d’intérêts. La présente étude s’est proposée d’utiliser le broyat de péricarpes des cabosses de cacao comme substrat de fermentation pour produire Bacillus thuringiensis var. kurstaki HD-1 (Btk HD-1). Les échantillons de péricarpes des cabosses ont été collectés dans une plantation cacaoyère de Toumokro à Yamoussoukro en Côte d’Ivoire. Les paramètres physico-chimiques ont été déterminés selon les méthodes standards. Le substrat de fermentation a été autoclavé, 2 fois successivement,...

The complete genome of pepper vein yellows virus (PeVYV) was sequenced using random amplification of RNA samples isolated from vector insects (Aphis gossypii) that had been given access to PeVYV-infected plants. The PeVYV genome consisted of 6244 nucleotides and had a genomic organization characteristic of members of the genus Polerovirus. PeVYV had highest amino acid sequence identities in ORF0 to ORF3 (75.9 - 91.9%) with tobacco vein distorting polerovirus, with which it was only 25.1% identical in ORF5. These sequence comparisons and previously studied biological properties indicate that Pe...

The complete genome of pepper vein yellows virus (PeVYV) was sequenced using random amplification of RNA samples isolated from vector insects (Aphis gossypii) that had been given access to PeVYV-infected plants. The PeVYV genome consisted of 6244 nucleotides and had a genomic organization characteristic of members of the genus Polerovirus. PeVYV had highest amino acid sequence identities in ORF0 to ORF3 (75.9 - 91.9%) with tobacco vein distorting polerovirus, with which it was only 25.1% identical in ORF5. These sequence comparisons and previously studied biological properties indicate that Pe...

The complete genome of pepper vein yellows virus (PeVYV) was sequenced using random amplification of RNA samples isolated from vector insects (Aphis gossypii) that had been given access to PeVYV-infected plants. The PeVYV genome consisted of 6244 nucleotides and had a genomic organization characteristic of members of the genus Polerovirus. PeVYV had highest amino acid sequence identities in ORF0 to ORF3 (75.9 - 91.9%) with tobacco vein distorting polerovirus, with which it was only 25.1% identical in ORF5. These sequence comparisons and previously studied biological properties indicate that Pe...

The complete genome of pepper vein yellows virus (PeVYV) was sequenced using random amplification of RNA samples isolated from vector insects (Aphis gossypii) that had been given access to PeVYV-infected plants. The PeVYV genome consisted of 6244 nucleotides and had a genomic organization characteristic of members of the genus Polerovirus. PeVYV had highest amino acid sequence identities in ORF0 to ORF3 (75.9 - 91.9%) with tobacco vein distorting polerovirus, with which it was only 25.1% identical in ORF5. These sequence comparisons and previously studied biological properties indicate that Pe...

The complete genome of pepper vein yellows virus (PeVYV) was sequenced using random amplification of RNA samples isolated from vector insects (Aphis gossypii) that had been given access to PeVYV-infected plants. The PeVYV genome consisted of 6244 nucleotides and had a genomic organization characteristic of members of the genus Polerovirus. PeVYV had highest amino acid sequence identities in ORF0 to ORF3 (75.9 - 91.9%) with tobacco vein distorting polerovirus, with which it was only 25.1% identical in ORF5. These sequence comparisons and previously studied biological properties indicate that Pe...

under the accession numbers KP265372 to 265383 (rpoD) and KP265384 to 265395 (gyrB).To our knowledge, this is the first confirmed characterization of X. axoponodis pv.manihotis in Ivory Coast using molecular tools.The presence of CBB needs to be considered since cassava cultivation is expanding in different regions of the country.

under the accession numbers KP265372 to 265383 (rpoD) and KP265384 to 265395 (gyrB).To our knowledge, this is the first confirmed characterization of X. axoponodis pv.manihotis in Ivory Coast using molecular tools.The presence of CBB needs to be considered since cassava cultivation is expanding in different regions of the country.

under the accession numbers KP265372 to 265383 (rpoD) and KP265384 to 265395 (gyrB).To our knowledge, this is the first confirmed characterization of X. axoponodis pv.manihotis in Ivory Coast using molecular tools.The presence of CBB needs to be considered since cassava cultivation is expanding in different regions of the country.

under the accession numbers KP265372 to 265383 (rpoD) and KP265384 to 265395 (gyrB).To our knowledge, this is the first confirmed characterization of X. axoponodis pv.manihotis in Ivory Coast using molecular tools.The presence of CBB needs to be considered since cassava cultivation is expanding in different regions of the country.

under the accession numbers KP265372 to 265383 (rpoD) and KP265384 to 265395 (gyrB).To our knowledge, this is the first confirmed characterization of X. axoponodis pv.manihotis in Ivory Coast using molecular tools.The presence of CBB needs to be considered since cassava cultivation is expanding in different regions of the country.

under the accession numbers KP265372 to 265383 (rpoD) and KP265384 to 265395 (gyrB).To our knowledge, this is the first confirmed characterization of X. axoponodis pv.manihotis in Ivory Coast using molecular tools.The presence of CBB needs to be considered since cassava cultivation is expanding in different regions of the country.

under the accession numbers KP265372 to 265383 (rpoD) and KP265384 to 265395 (gyrB).To our knowledge, this is the first confirmed characterization of X. axoponodis pv.manihotis in Ivory Coast using molecular tools.The presence of CBB needs to be considered since cassava cultivation is expanding in different regions of the country.

under the accession numbers KP265372 to 265383 (rpoD) and KP265384 to 265395 (gyrB).To our knowledge, this is the first confirmed characterization of X. axoponodis pv.manihotis in Ivory Coast using molecular tools.The presence of CBB needs to be considered since cassava cultivation is expanding in different regions of the country.

Objectif : La fusariose vasculaire du palmier à huile, causée par le champignon Fusarium oxysporum f.sp. elaeidis, est une contrainte pathologique majeure pour la culture du palmier à huile en Afrique, notamment en Côte d’Ivoire. Dans la zone dite « savane de Dabou », en Côte d’Ivoire où la maladie sévit de manière endémique, les travaux de recherche de lutte intégrée à la fusariose, ont été réalisés dans le cadre de cette étude sur des parcelles à antécédent cultural cocotier ou palmier. Aussi, notre étude a-t-elle pour objectif général de confirmer les résultats de recherche obtenus pour l’a...

Objectif : La fusariose vasculaire du palmier à huile, causée par le champignon Fusarium oxysporum f.sp. elaeidis, est une contrainte pathologique majeure pour la culture du palmier à huile en Afrique, notamment en Côte d’Ivoire. Dans la zone dite « savane de Dabou », en Côte d’Ivoire où la maladie sévit de manière endémique, les travaux de recherche de lutte intégrée à la fusariose, ont été réalisés dans le cadre de cette étude sur des parcelles à antécédent cultural cocotier ou palmier. Aussi, notre étude a-t-elle pour objectif général de confirmer les résultats de recherche obtenus pour l’a...

Objectif : La fusariose vasculaire du palmier à huile, causée par le champignon Fusarium oxysporum f.sp. elaeidis, est une contrainte pathologique majeure pour la culture du palmier à huile en Afrique, notamment en Côte d’Ivoire. Dans la zone dite « savane de Dabou », en Côte d’Ivoire où la maladie sévit de manière endémique, les travaux de recherche de lutte intégrée à la fusariose, ont été réalisés dans le cadre de cette étude sur des parcelles à antécédent cultural cocotier ou palmier. Aussi, notre étude a-t-elle pour objectif général de confirmer les résultats de recherche obtenus pour l’a...

Objectif : La fusariose vasculaire du palmier à huile, causée par le champignon Fusarium oxysporum f.sp. elaeidis, est une contrainte pathologique majeure pour la culture du palmier à huile en Afrique, notamment en Côte d’Ivoire. Dans la zone dite « savane de Dabou », en Côte d’Ivoire où la maladie sévit de manière endémique, les travaux de recherche de lutte intégrée à la fusariose, ont été réalisés dans le cadre de cette étude sur des parcelles à antécédent cultural cocotier ou palmier. Aussi, notre étude a-t-elle pour objectif général de confirmer les résultats de recherche obtenus pour l’a...

Objectif : La fusariose vasculaire du palmier à huile, causée par le champignon Fusarium oxysporum f.sp. elaeidis, est une contrainte pathologique majeure pour la culture du palmier à huile en Afrique, notamment en Côte d’Ivoire. Dans la zone dite « savane de Dabou », en Côte d’Ivoire où la maladie sévit de manière endémique, les travaux de recherche de lutte intégrée à la fusariose, ont été réalisés dans le cadre de cette étude sur des parcelles à antécédent cultural cocotier ou palmier. Aussi, notre étude a-t-elle pour objectif général de confirmer les résultats de recherche obtenus pour l’a...

Objectif : La fusariose vasculaire du palmier à huile, causée par le champignon Fusarium oxysporum f.sp. elaeidis, est une contrainte pathologique majeure pour la culture du palmier à huile en Afrique, notamment en Côte d’Ivoire. Dans la zone dite « savane de Dabou », en Côte d’Ivoire où la maladie sévit de manière endémique, les travaux de recherche de lutte intégrée à la fusariose, ont été réalisés dans le cadre de cette étude sur des parcelles à antécédent cultural cocotier ou palmier. Aussi, notre étude a-t-elle pour objectif général de confirmer les résultats de recherche obtenus pour l’a...

Objectif : La fusariose vasculaire du palmier à huile, causée par le champignon Fusarium oxysporum f.sp. elaeidis, est une contrainte pathologique majeure pour la culture du palmier à huile en Afrique, notamment en Côte d’Ivoire. Dans la zone dite « savane de Dabou », en Côte d’Ivoire où la maladie sévit de manière endémique, les travaux de recherche de lutte intégrée à la fusariose, ont été réalisés dans le cadre de cette étude sur des parcelles à antécédent cultural cocotier ou palmier. Aussi, notre étude a-t-elle pour objectif général de confirmer les résultats de recherche obtenus pour l’a...

Background and Objective: Pod rot disease caused by Phytophthora palmivora is one of the causes of low productivity in cocoa plants.The objective of the study was to determine the effectiveness of botanical pesticides composite inhibiting the growth of Phytophthora palmivora biomass and to know the type of botanical pesticides composite that able to inhibit the black pod rot disease in cocoa.

Background and Objective: Pod rot disease caused by Phytophthora palmivora is one of the causes of low productivity in cocoa plants.The objective of the study was to determine the effectiveness of botanical pesticides composite inhibiting the growth of Phytophthora palmivora biomass and to know the type of botanical pesticides composite that able to inhibit the black pod rot disease in cocoa.

Background and Objective: Pod rot disease caused by Phytophthora palmivora is one of the causes of low productivity in cocoa plants.The objective of the study was to determine the effectiveness of botanical pesticides composite inhibiting the growth of Phytophthora palmivora biomass and to know the type of botanical pesticides composite that able to inhibit the black pod rot disease in cocoa.

Background and Objective: Pod rot disease caused by Phytophthora palmivora is one of the causes of low productivity in cocoa plants.The objective of the study was to determine the effectiveness of botanical pesticides composite inhibiting the growth of Phytophthora palmivora biomass and to know the type of botanical pesticides composite that able to inhibit the black pod rot disease in cocoa.

Background and Objective: Pod rot disease caused by Phytophthora palmivora is one of the causes of low productivity in cocoa plants.The objective of the study was to determine the effectiveness of botanical pesticides composite inhibiting the growth of Phytophthora palmivora biomass and to know the type of botanical pesticides composite that able to inhibit the black pod rot disease in cocoa.

The study was conducted to assess the fertility potential of cotton soilsin Côte d’Ivoire. A total of 500 plots of cotton farmers in 5 regions of thecotton basin was selected for soil sampling in the horizon 0-20 cm. Thechemical analyzes of soil samples in the laboratory were performed on thefollowing parameters: particle size, pHwater, organic matter, total N, availableP, K, Ca, Mg and Cation Exchange Capacity (CEC) of soil. The physicalcharacterization revealed that the studied soils are mainly sandy texture in thesurface horizon. This gives them a very low retention capacity. The chemicalch...

The study was conducted to assess the fertility potential of cotton soilsin Côte d’Ivoire. A total of 500 plots of cotton farmers in 5 regions of thecotton basin was selected for soil sampling in the horizon 0-20 cm. Thechemical analyzes of soil samples in the laboratory were performed on thefollowing parameters: particle size, pHwater, organic matter, total N, availableP, K, Ca, Mg and Cation Exchange Capacity (CEC) of soil. The physicalcharacterization revealed that the studied soils are mainly sandy texture in thesurface horizon. This gives them a very low retention capacity. The chemicalch...

The study was conducted to assess the fertility potential of cotton soilsin Côte d’Ivoire. A total of 500 plots of cotton farmers in 5 regions of thecotton basin was selected for soil sampling in the horizon 0-20 cm. Thechemical analyzes of soil samples in the laboratory were performed on thefollowing parameters: particle size, pHwater, organic matter, total N, availableP, K, Ca, Mg and Cation Exchange Capacity (CEC) of soil. The physicalcharacterization revealed that the studied soils are mainly sandy texture in thesurface horizon. This gives them a very low retention capacity. The chemicalch...

The study was conducted to assess the fertility potential of cotton soilsin Côte d’Ivoire. A total of 500 plots of cotton farmers in 5 regions of thecotton basin was selected for soil sampling in the horizon 0-20 cm. Thechemical analyzes of soil samples in the laboratory were performed on thefollowing parameters: particle size, pHwater, organic matter, total N, availableP, K, Ca, Mg and Cation Exchange Capacity (CEC) of soil. The physicalcharacterization revealed that the studied soils are mainly sandy texture in thesurface horizon. This gives them a very low retention capacity. The chemicalch...

The study was conducted to assess the fertility potential of cotton soilsin Côte d’Ivoire. A total of 500 plots of cotton farmers in 5 regions of thecotton basin was selected for soil sampling in the horizon 0-20 cm. Thechemical analyzes of soil samples in the laboratory were performed on thefollowing parameters: particle size, pHwater, organic matter, total N, availableP, K, Ca, Mg and Cation Exchange Capacity (CEC) of soil. The physicalcharacterization revealed that the studied soils are mainly sandy texture in thesurface horizon. This gives them a very low retention capacity. The chemicalch...

The study was conducted to assess the fertility potential of cotton soilsin Côte d’Ivoire. A total of 500 plots of cotton farmers in 5 regions of thecotton basin was selected for soil sampling in the horizon 0-20 cm. Thechemical analyzes of soil samples in the laboratory were performed on thefollowing parameters: particle size, pHwater, organic matter, total N, availableP, K, Ca, Mg and Cation Exchange Capacity (CEC) of soil. The physicalcharacterization revealed that the studied soils are mainly sandy texture in thesurface horizon. This gives them a very low retention capacity. The chemicalch...

The genetic and phenotypic diversity of Côte d'Ivoire Ralstonia solanacearum strains was assessed on a 168-strain collection sampled on Solanaceae both in the southern lowlands and western highlands. Phylotypes I, II, and III were prevalent, though at unexpected frequencies. Phylotype I strains (87.5%) were genetically diverse and overrepresented in all agroecological areas, including highlands (AEZ III). Phylotype II strains (10.7%) only belonged to one tropical lowland-adapted broad host range lineage (IIA-35), whereas no highland-adapted potato brown rot (IIB-1) or Moko strains were detecte...

The genetic and phenotypic diversity of Côte d'Ivoire Ralstonia solanacearum strains was assessed on a 168-strain collection sampled on Solanaceae both in the southern lowlands and western highlands. Phylotypes I, II, and III were prevalent, though at unexpected frequencies. Phylotype I strains (87.5%) were genetically diverse and overrepresented in all agroecological areas, including highlands (AEZ III). Phylotype II strains (10.7%) only belonged to one tropical lowland-adapted broad host range lineage (IIA-35), whereas no highland-adapted potato brown rot (IIB-1) or Moko strains were detecte...

The genetic and phenotypic diversity of Côte d'Ivoire Ralstonia solanacearum strains was assessed on a 168-strain collection sampled on Solanaceae both in the southern lowlands and western highlands. Phylotypes I, II, and III were prevalent, though at unexpected frequencies. Phylotype I strains (87.5%) were genetically diverse and overrepresented in all agroecological areas, including highlands (AEZ III). Phylotype II strains (10.7%) only belonged to one tropical lowland-adapted broad host range lineage (IIA-35), whereas no highland-adapted potato brown rot (IIB-1) or Moko strains were detecte...

The genetic and phenotypic diversity of Côte d'Ivoire Ralstonia solanacearum strains was assessed on a 168-strain collection sampled on Solanaceae both in the southern lowlands and western highlands. Phylotypes I, II, and III were prevalent, though at unexpected frequencies. Phylotype I strains (87.5%) were genetically diverse and overrepresented in all agroecological areas, including highlands (AEZ III). Phylotype II strains (10.7%) only belonged to one tropical lowland-adapted broad host range lineage (IIA-35), whereas no highland-adapted potato brown rot (IIB-1) or Moko strains were detecte...

The genetic and phenotypic diversity of Côte d'Ivoire Ralstonia solanacearum strains was assessed on a 168-strain collection sampled on Solanaceae both in the southern lowlands and western highlands. Phylotypes I, II, and III were prevalent, though at unexpected frequencies. Phylotype I strains (87.5%) were genetically diverse and overrepresented in all agroecological areas, including highlands (AEZ III). Phylotype II strains (10.7%) only belonged to one tropical lowland-adapted broad host range lineage (IIA-35), whereas no highland-adapted potato brown rot (IIB-1) or Moko strains were detecte...

The genetic and phenotypic diversity of Côte d'Ivoire Ralstonia solanacearum strains was assessed on a 168-strain collection sampled on Solanaceae both in the southern lowlands and western highlands. Phylotypes I, II, and III were prevalent, though at unexpected frequencies. Phylotype I strains (87.5%) were genetically diverse and overrepresented in all agroecological areas, including highlands (AEZ III). Phylotype II strains (10.7%) only belonged to one tropical lowland-adapted broad host range lineage (IIA-35), whereas no highland-adapted potato brown rot (IIB-1) or Moko strains were detecte...

The genetic and phenotypic diversity of Côte d'Ivoire Ralstonia solanacearum strains was assessed on a 168-strain collection sampled on Solanaceae both in the southern lowlands and western highlands. Phylotypes I, II, and III were prevalent, though at unexpected frequencies. Phylotype I strains (87.5%) were genetically diverse and overrepresented in all agroecological areas, including highlands (AEZ III). Phylotype II strains (10.7%) only belonged to one tropical lowland-adapted broad host range lineage (IIA-35), whereas no highland-adapted potato brown rot (IIB-1) or Moko strains were detecte...

The genetic and phenotypic diversity of Côte d'Ivoire Ralstonia solanacearum strains was assessed on a 168-strain collection sampled on Solanaceae both in the southern lowlands and western highlands. Phylotypes I, II, and III were prevalent, though at unexpected frequencies. Phylotype I strains (87.5%) were genetically diverse and overrepresented in all agroecological areas, including highlands (AEZ III). Phylotype II strains (10.7%) only belonged to one tropical lowland-adapted broad host range lineage (IIA-35), whereas no highland-adapted potato brown rot (IIB-1) or Moko strains were detecte...

Anthracnose is the most important post-harvest disease of mango caused by Colletotrichum gloeosporioïdes in Côte d'Ivoire. This study was conducted to evaluate the pathogenicity of 5 isolates (CA1, CA2, CB2, CB3 and CK2) of C. gloeosporioïdes. The isolates were obtained from naturally infected fruits of varieties including Brooks (CB2 and CB3), Kent (CK2) and Amelia (CA1 and CA2). The mycelium plugs of each purified isolate were used for a wound or no wound inoculation of Brooks and Keitt mango fruits. The dates of the first lesions appearance with their sizes were assessed. The inoculation wi...

Anthracnose is the most important post-harvest disease of mango caused by Colletotrichum gloeosporioïdes in Côte d'Ivoire. This study was conducted to evaluate the pathogenicity of 5 isolates (CA1, CA2, CB2, CB3 and CK2) of C. gloeosporioïdes. The isolates were obtained from naturally infected fruits of varieties including Brooks (CB2 and CB3), Kent (CK2) and Amelia (CA1 and CA2). The mycelium plugs of each purified isolate were used for a wound or no wound inoculation of Brooks and Keitt mango fruits. The dates of the first lesions appearance with their sizes were assessed. The inoculation wi...

Anthracnose is the most important post-harvest disease of mango caused by Colletotrichum gloeosporioïdes in Côte d'Ivoire. This study was conducted to evaluate the pathogenicity of 5 isolates (CA1, CA2, CB2, CB3 and CK2) of C. gloeosporioïdes. The isolates were obtained from naturally infected fruits of varieties including Brooks (CB2 and CB3), Kent (CK2) and Amelia (CA1 and CA2). The mycelium plugs of each purified isolate were used for a wound or no wound inoculation of Brooks and Keitt mango fruits. The dates of the first lesions appearance with their sizes were assessed. The inoculation wi...

Anthracnose is the most important post-harvest disease of mango caused by Colletotrichum gloeosporioïdes in Côte d'Ivoire. This study was conducted to evaluate the pathogenicity of 5 isolates (CA1, CA2, CB2, CB3 and CK2) of C. gloeosporioïdes. The isolates were obtained from naturally infected fruits of varieties including Brooks (CB2 and CB3), Kent (CK2) and Amelia (CA1 and CA2). The mycelium plugs of each purified isolate were used for a wound or no wound inoculation of Brooks and Keitt mango fruits. The dates of the first lesions appearance with their sizes were assessed. The inoculation wi...

Anthracnose is the most important post-harvest disease of mango caused by Colletotrichum gloeosporioïdes in Côte d'Ivoire. This study was conducted to evaluate the pathogenicity of 5 isolates (CA1, CA2, CB2, CB3 and CK2) of C. gloeosporioïdes. The isolates were obtained from naturally infected fruits of varieties including Brooks (CB2 and CB3), Kent (CK2) and Amelia (CA1 and CA2). The mycelium plugs of each purified isolate were used for a wound or no wound inoculation of Brooks and Keitt mango fruits. The dates of the first lesions appearance with their sizes were assessed. The inoculation wi...

Anthracnose is the most important post-harvest disease of mango caused by Colletotrichum gloeosporioïdes in Côte d'Ivoire. This study was conducted to evaluate the pathogenicity of 5 isolates (CA1, CA2, CB2, CB3 and CK2) of C. gloeosporioïdes. The isolates were obtained from naturally infected fruits of varieties including Brooks (CB2 and CB3), Kent (CK2) and Amelia (CA1 and CA2). The mycelium plugs of each purified isolate were used for a wound or no wound inoculation of Brooks and Keitt mango fruits. The dates of the first lesions appearance with their sizes were assessed. The inoculation wi...

Abstract We identified the extent to which ant diversity occurs despite conversion of forests into cocoa plantations by examining the communities across four age classes of plantations (classes I–IV with increasing age from 0–5 to 21–40 years) and in their original forests. An extensive sampling protocol consisting of pitfall trapping, leaf litter sampling, soil sampling and hand sampling was used to characterize ant species richness and composition in three replicates of each age class and in the remaining forest patches. A total of one hundred ant species was found in all habitats combined....

Abstract We identified the extent to which ant diversity occurs despite conversion of forests into cocoa plantations by examining the communities across four age classes of plantations (classes I–IV with increasing age from 0–5 to 21–40 years) and in their original forests. An extensive sampling protocol consisting of pitfall trapping, leaf litter sampling, soil sampling and hand sampling was used to characterize ant species richness and composition in three replicates of each age class and in the remaining forest patches. A total of one hundred ant species was found in all habitats combined....

Abstract We identified the extent to which ant diversity occurs despite conversion of forests into cocoa plantations by examining the communities across four age classes of plantations (classes I–IV with increasing age from 0–5 to 21–40 years) and in their original forests. An extensive sampling protocol consisting of pitfall trapping, leaf litter sampling, soil sampling and hand sampling was used to characterize ant species richness and composition in three replicates of each age class and in the remaining forest patches. A total of one hundred ant species was found in all habitats combined....

Abstract We identified the extent to which ant diversity occurs despite conversion of forests into cocoa plantations by examining the communities across four age classes of plantations (classes I–IV with increasing age from 0–5 to 21–40 years) and in their original forests. An extensive sampling protocol consisting of pitfall trapping, leaf litter sampling, soil sampling and hand sampling was used to characterize ant species richness and composition in three replicates of each age class and in the remaining forest patches. A total of one hundred ant species was found in all habitats combined....

Abstract We identified the extent to which ant diversity occurs despite conversion of forests into cocoa plantations by examining the communities across four age classes of plantations (classes I–IV with increasing age from 0–5 to 21–40 years) and in their original forests. An extensive sampling protocol consisting of pitfall trapping, leaf litter sampling, soil sampling and hand sampling was used to characterize ant species richness and composition in three replicates of each age class and in the remaining forest patches. A total of one hundred ant species was found in all habitats combined....

La question de l’impact de l’agriculture urbaine sur l’environnement revient, fréquemment, au coeur des débats dans la gestion des villes africaines, comme Yamoussoukro. Les inquiétudes liées à la préservation de l’environnement urbain, eu égard à l’usage de pesticides et à la qualité des eaux utilisées, constituent une préoccupation prise en compte dans le cadre de cette étude. Celle-ci porte, aussi bien sur l’évaluation du risque sur l’environnement consécutif à de mauvai...

La question de l’impact de l’agriculture urbaine sur l’environnement revient, fréquemment, au coeur des débats dans la gestion des villes africaines, comme Yamoussoukro. Les inquiétudes liées à la préservation de l’environnement urbain, eu égard à l’usage de pesticides et à la qualité des eaux utilisées, constituent une préoccupation prise en compte dans le cadre de cette étude. Celle-ci porte, aussi bien sur l’évaluation du risque sur l’environnement consécutif à de mauvai...

La question de l’impact de l’agriculture urbaine sur l’environnement revient, fréquemment, au coeur des débats dans la gestion des villes africaines, comme Yamoussoukro. Les inquiétudes liées à la préservation de l’environnement urbain, eu égard à l’usage de pesticides et à la qualité des eaux utilisées, constituent une préoccupation prise en compte dans le cadre de cette étude. Celle-ci porte, aussi bien sur l’évaluation du risque sur l’environnement consécutif à de mauvai...

La question de l’impact de l’agriculture urbaine sur l’environnement revient, fréquemment, au coeur des débats dans la gestion des villes africaines, comme Yamoussoukro. Les inquiétudes liées à la préservation de l’environnement urbain, eu égard à l’usage de pesticides et à la qualité des eaux utilisées, constituent une préoccupation prise en compte dans le cadre de cette étude. Celle-ci porte, aussi bien sur l’évaluation du risque sur l’environnement consécutif à de mauvai...

Résumés Français Anglais Les huiles essentielles extraites par hydrodistillation de deux plantes aromatiques de l'Afrique occidentale – Melaleuca quinquenervia (L), et Ocimum gratissimum (L) – ont été testées par fumigation à différentes concentrations sur la forme non voilière de Callosobruchus maculatus Fab, à une température de 27,5 ± 0,2 °C et à une humidité relative de 80,3 ± 1,6 %. Ces huiles présentent une activité insecticide et entraînent, chez les femelles de C. maculatus, une réduction très significative de la ponte par rapport à celle dans le témoin. L'huile essentielle de M. qinqu...

Résumés Français Anglais Les huiles essentielles extraites par hydrodistillation de deux plantes aromatiques de l'Afrique occidentale – Melaleuca quinquenervia (L), et Ocimum gratissimum (L) – ont été testées par fumigation à différentes concentrations sur la forme non voilière de Callosobruchus maculatus Fab, à une température de 27,5 ± 0,2 °C et à une humidité relative de 80,3 ± 1,6 %. Ces huiles présentent une activité insecticide et entraînent, chez les femelles de C. maculatus, une réduction très significative de la ponte par rapport à celle dans le témoin. L'huile essentielle de M. qinqu...

Résumés Français Anglais Les huiles essentielles extraites par hydrodistillation de deux plantes aromatiques de l'Afrique occidentale – Melaleuca quinquenervia (L), et Ocimum gratissimum (L) – ont été testées par fumigation à différentes concentrations sur la forme non voilière de Callosobruchus maculatus Fab, à une température de 27,5 ± 0,2 °C et à une humidité relative de 80,3 ± 1,6 %. Ces huiles présentent une activité insecticide et entraînent, chez les femelles de C. maculatus, une réduction très significative de la ponte par rapport à celle dans le témoin. L'huile essentielle de M. qinqu...

Résumés Français Anglais Les huiles essentielles extraites par hydrodistillation de deux plantes aromatiques de l'Afrique occidentale – Melaleuca quinquenervia (L), et Ocimum gratissimum (L) – ont été testées par fumigation à différentes concentrations sur la forme non voilière de Callosobruchus maculatus Fab, à une température de 27,5 ± 0,2 °C et à une humidité relative de 80,3 ± 1,6 %. Ces huiles présentent une activité insecticide et entraînent, chez les femelles de C. maculatus, une réduction très significative de la ponte par rapport à celle dans le témoin. L'huile essentielle de M. qinqu...

Résumés Français Anglais Les huiles essentielles extraites par hydrodistillation de deux plantes aromatiques de l'Afrique occidentale – Melaleuca quinquenervia (L), et Ocimum gratissimum (L) – ont été testées par fumigation à différentes concentrations sur la forme non voilière de Callosobruchus maculatus Fab, à une température de 27,5 ± 0,2 °C et à une humidité relative de 80,3 ± 1,6 %. Ces huiles présentent une activité insecticide et entraînent, chez les femelles de C. maculatus, une réduction très significative de la ponte par rapport à celle dans le témoin. L'huile essentielle de M. qinqu...

Résumés Français Anglais Les huiles essentielles extraites par hydrodistillation de deux plantes aromatiques de l'Afrique occidentale – Melaleuca quinquenervia (L), et Ocimum gratissimum (L) – ont été testées par fumigation à différentes concentrations sur la forme non voilière de Callosobruchus maculatus Fab, à une température de 27,5 ± 0,2 °C et à une humidité relative de 80,3 ± 1,6 %. Ces huiles présentent une activité insecticide et entraînent, chez les femelles de C. maculatus, une réduction très significative de la ponte par rapport à celle dans le témoin. L'huile essentielle de M. qinqu...

Résumés Français Anglais Les huiles essentielles extraites par hydrodistillation de deux plantes aromatiques de l'Afrique occidentale – Melaleuca quinquenervia (L), et Ocimum gratissimum (L) – ont été testées par fumigation à différentes concentrations sur la forme non voilière de Callosobruchus maculatus Fab, à une température de 27,5 ± 0,2 °C et à une humidité relative de 80,3 ± 1,6 %. Ces huiles présentent une activité insecticide et entraînent, chez les femelles de C. maculatus, une réduction très significative de la ponte par rapport à celle dans le témoin. L'huile essentielle de M. qinqu...

In this article, we present a chatbot model that can automatically respond to learners’ concerns on an online training platform. The proposed chatbot model is based on an adaptation of the similarity of Dice to understand the concerns of learners. The first phase of this approach allows selecting the pre-established concerns that the teacher has in a knowledge base which are closest to those posed by the learner. The second phase consists of selecting among these k most appropriate concerns based on a measure of similarity built on the concept of domain keywords. The experimentation of the pro...

In this article, we present a chatbot model that can automatically respond to learners’ concerns on an online training platform. The proposed chatbot model is based on an adaptation of the similarity of Dice to understand the concerns of learners. The first phase of this approach allows selecting the pre-established concerns that the teacher has in a knowledge base which are closest to those posed by the learner. The second phase consists of selecting among these k most appropriate concerns based on a measure of similarity built on the concept of domain keywords. The experimentation of the pro...

In this article, we present a chatbot model that can automatically respond to learners’ concerns on an online training platform. The proposed chatbot model is based on an adaptation of the similarity of Dice to understand the concerns of learners. The first phase of this approach allows selecting the pre-established concerns that the teacher has in a knowledge base which are closest to those posed by the learner. The second phase consists of selecting among these k most appropriate concerns based on a measure of similarity built on the concept of domain keywords. The experimentation of the pro...

In this article, we present a chatbot model that can automatically respond to learners’ concerns on an online training platform. The proposed chatbot model is based on an adaptation of the similarity of Dice to understand the concerns of learners. The first phase of this approach allows selecting the pre-established concerns that the teacher has in a knowledge base which are closest to those posed by the learner. The second phase consists of selecting among these k most appropriate concerns based on a measure of similarity built on the concept of domain keywords. The experimentation of the pro...

In this article, we present a chatbot model that can automatically respond to learners’ concerns on an online training platform. The proposed chatbot model is based on an adaptation of the similarity of Dice to understand the concerns of learners. The first phase of this approach allows selecting the pre-established concerns that the teacher has in a knowledge base which are closest to those posed by the learner. The second phase consists of selecting among these k most appropriate concerns based on a measure of similarity built on the concept of domain keywords. The experimentation of the pro...

Belief entropy, which represents the uncertainty measure between several pieces of evidence in the Dempster-Shafer framework, is attracting increasing interest in research. It has been used in many applications and is mainly based on the theory of evidence. To quantify uncertainty, several measures have been proposed in the literature. These measures, sometimes in extended or hybrid forms, use the Shannon entropy principle to determine uncertainty degree. However, the failure to consider the scale of the frame of discernment framework remains an open issue in quantifying uncertainty. In this p...

Belief entropy, which represents the uncertainty measure between several pieces of evidence in the Dempster-Shafer framework, is attracting increasing interest in research. It has been used in many applications and is mainly based on the theory of evidence. To quantify uncertainty, several measures have been proposed in the literature. These measures, sometimes in extended or hybrid forms, use the Shannon entropy principle to determine uncertainty degree. However, the failure to consider the scale of the frame of discernment framework remains an open issue in quantifying uncertainty. In this p...