In order to contribute to cotton cultivation sustainability in west central Côte d'Ivoire, a phytosanitary diagnostic study was conducted in 11 plots. It consisted of monitoring the sanitary condition of 10 rural plots and an experiment plot set up at the Research Farm of University Jean Lorougnon Guédé of Daloa according to the regular and careful inspection of cotton seed germination, seedling health and cotton plants throughout the growing season. The results obtained indicated that the cotton varieties used by farmers had very low germination with maximum number of healthy seedlings of 43.75 % in an experiment condition. Highest number of infected seedlings (24-51%) showing characteristic symptoms of seedling blight leading to their death was observed. Under cultivation, a variety of pests was identified on cotton plants. The most important were Bemisia tabaci, Jacobiella fasciali, Helicoverpa armigera, Dysdercus sp, Earias sp, Zonocerus Variegatus, Haritalodes derogata. The Species Zonocerus Variegatus and Haritalodes derogata proved to be devastating on the experimental plot where 100% loss was recorded. The main disease observed at flowering stages in cotton plants was cotton virescence disease. Although lowly infection were observed (0.11 -0.35%) cotton cultivation monitoring and management must be set up so as to prevent its expansion in the west central. Theses finding gives useful information to farmers to reduce cotton yield losses in west central Côte d'Ivoire.Int. J. Appl. Sci. Biotechnol. Vol 6(2): 152-157
The objective of this study is to evaluate the agro-morphologicals parameters of Myrianthus arboreus in five localities of the Côte d'Ivoire. Seventy-five individuals of Myrianthus arboreus collected in five localities of Côte d'Ivoire (Abengourou, Adzopé, Daloa, Diabo and Zouan Hounien), have been evaluated agro-morphologically. Twelve characters selected from the descriptors of this plant were used in this study. Statistical analysis revealed a high variability between the individuals collected. But a higher value of parameters tested was recorded in Abengourou than Diabo. Positive correlations were observed between leaf, production parameters and between foliage and production parameters. Hierarchical Classification Analysis associated with Discriminant Factor Analysis showed that individuals tested were split in three groups with complementary characteristics. Among parameters tested leaves width and fruits full quarter's number were revealed as discriminating factors.
Cowpea is a food legume very popular for its seeds and leaves in Côte d’Ivoire. This plant constitutes a significant source of financial income for vulnerable populations in rural areas. However, it production remains low in the growing areas because of the traditional practice of this food. In other words, the cultivation technique adopted for this plant is not appropriate, in particular the sowing density. To solve this problem, research work has been undertaken in 2019 and 2020 with the aim of improving the production of this crop. The first year consisted of identifying the most productive variety in a complete random arrangement with three replicates. During the second, the trials concerned the optimization of the production of this variety by controlling the seed density. For this purpose, the sowing was carried out according to three sowing densities: low density (40.000 plants/ha), middle density (134.444 plants/ha) and high density (280.000 plants/ha) in a complete random device with three repetitions. The parameters collected from sowing to harvest and after harvest were subjected to statistical analysis. Thus, it emerges from this analysis that the creeping variety recorded the best values of the growth parameters. This variety could be used as fodder for animal feed. For variables related to production, the highest values were obtained with the upright variety. The yield of this variety is doubled when cultivated at low density. Thus, for the financial and food empowerment of cowpea producers, they will have to take an interest in the upright variety and cultivate it in low density.
Bottle gourd Lagenaria siceraria (Molina) Standl is one of oleaginous cucurbits grown in Côte d'Ivoire with socio-economic and food importance that could play an important role in food security. The increase in the production of this species for improvement of plant yield remains a major challenge that begins with the agro-morphological characterization of local varieties present in different production areas. The objective of this study is to estimate agro-morphological variability within Lagenaria siceraria seed collection of Nangui Abrogoua University. The study focused on 26 accessions collected in the different production areas of the species. The experimental design is a randomized complementary block. Descriptive analyzes under the observation of fourteen descriptors showed existence of a great variability between accessions for the yield characters. Multiple variance analysis showed that there is a highly significant difference between accessions and provenances for the majority of traits studied. The structuring of accessions according to areas collection revealed by principal component analysis is confirmed by discriminant factor analysis. The classification of accessions and identification of the groups were carried out by hierarchical ascending classification which made it possible to elaborate a dendrogram which presents two groups of phenotypic diversity. It appears that the most relevant variables that describe the best variability between groups are fruit size (FH), fruit weight (FW), number of seed (NS), and seed weight (SW). These analyzed characters can thus constitute basic criteria to differentiate accessions and to be used in studies of morphological diversity of L. siceraria.
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