Okra is a plant rich in nutrients and is very well consumed in Côte d'Ivoire. Despite its many benefits, the production of this vegetable is still weak in our country. The reasons for this include the inadequate selection of varieties, the high cost of inputs and the poverty of the soil for its cultivation. One of the alternatives for sustained production is to solve the problem of soil fertility. In the case of our work, the aim is to improve the yield of okra. To achieve this goal, experiments were undertaken to evaluate the impact of activated charcoal on morphological parameters of a local okra variety. For this purpose, the charcoal used was activated in three different times (activation time equal to 0 days, 15 days and 30 days). The experimental device used is a split-plot with three repetitions, each comprising 12 elementary plots. The various charcoals were buried the same day. Then, the seedling was done with two positions including outside position and inside position. Observations were made on 360 plants. An analysis of the variances was carried out on the morphological parameters. Fruit mass is the variable most influenced by activated charcoal. Thus, the greatest value of the mass was obtained with the charcoal CA0, with outside position.

La Tomate est un légume-fruit riche en éléments nutritifs et très prisée en Côte d'Ivoire. Malgré ses nombreux bienfaits, sa production reste encore faible dans notre pays. Cette faible production est entre autre due à la forte pression parasitaire, à l'influence des facteurs abiotiques et aux pratiques agricoles rudimentaires. Dans nos travaux, l'objectif recherché était d'améliorer la production de la tomate. Pour atteindre cet objectif, une expérience portant sur la culture de la tomate en hors sol a été effectuée. A cet effet, quatre traitements de la sciure de bois ont été testés sur une culture de tomate (variété F1 cobra 26) dans le domaine expérimentale champ école de

La culture de la tomate en Côte d’Ivoire est sujette aux attaques de nombreux pathogènes qui sont à l'origine de dégâts au champ et en post-récolte. Aussi pour réduire l’impact des maladies sur les cultures, différentes méthodes de lutte sont utilisées. C’est dans cette optique que cette étude a été entreprise. Elle a consisté à tester l’efficacité des extraits d’Alchornea cordifolia ; Mezoneuron benthamianum, et Tithonia diversifolia sur les symptômes des maladies d’une parcelle de tomate cultivée à Daloa. Les extraits poudreux de ces trois plantes ont été utilisés pour traiter un sol de culture infesté à la quantité 5 g et 15 g par poquet à différentes périodes : un mois et deux semaines avant repiquage et le jour du repiquage. Les résultats montrent que les extraits de A. cordifolia, M. benthamianum et T. diversifolia réduisent considérablement l’incidence et la sévérité des symptômes par rapport au témoin. Ainsi, le traitement du sol un mois avant le repiquage a montré des incidences plus faibles au niveau des symptômes de jaunissement (32,27 à 55 %), de l’enroulement (30 à 45,55 %) et de flétrissement (0 à 8,33 %). Au niveau de la sévérité des symptômes foliaires, le traitement du sol le jour du repiquage a induit une sévérité moindre du jaunissement et de l’enroulement sur les plants de tomate avec M. benthamianum tandis que le sur le flétrissement, c’est le traitement du sol un mois avant le repiquage qui donne les plus faibles sévérités (0 à 0,5) pour tous les traitements. Au niveau des galles racinaires, le traitement du sol un mois avant le repiquage induit des faibles incidences et des symptômes moins sévères. A. cordifolia a été plus efficace à la quantité de 5 g/poquet. Cette étude montre que les extraits de plantes tels que A. cordifolia, M. benthamianum, et T. diversifolia pourraient être utilisés comme méthode efficace de contrôle des maladies de la tomate en culture. The tomato crop in Côte d'Ivoire is subject to attack by many pathogens that cause damage in the field and post-harvest. This study consisted in testing the efficacy of extracts of Alchornea cordifolia; Mezoneuron benthamianum, Tithonia diversifolia on the symptoms of diseases in a tomato plot grown in Daloa. The powdery extracts of these three plants were used to treat crop soil in the quantity of 5g and 15g/pack at different periods: one and two months before transplanting and the day of transplanting. The health analysis of the plants from the infested soil after different applications of A. cordifolia, M. benthamianum and T. diversifolia extracts gave lower incidences and severities of symptoms compared to the control. Thus, the soil treatment one month before transplanting showed the lowest incidences of yellowing (32.27 to 55%), leaf curl (30 to 45.55%), and wilting (0 to 8.33%) symptoms. Regarding the severity of foliar symptoms, the soil treatment on the day of transplanting induced a lower severity of yellowing and leafroll on tomato plants with M. benthamianum while wilting, the soil treatment one month before transplanting gave the lowest severity (0 to 0.5) for all treatments For root galls, soil treatment one month before transplanting induced low incidences and less severe symptoms. A. cordifolia was more effective at 5 g/pack. This study shows that plant extracts such as A. cordifolia, M. benthamianum, and T. diversifolia could be used as an effective method for controlling tomato diseases in cultivation.

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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.