Cacaoculture intensification has led to a reduction of the forest area and a continuous decline of woody trees number in cocoa plantations. In the context of climate change, Côte d’Ivoire, the world’s largest producer of cocoa beans, has opted for agroforestry practices to ensure sustainable cocoa production. However, the impact of this choice on cocoa production is not evaluated, let alone the characteristics of existing agroforestry systems. Our objective is to study the effect of different types of agroforestry systems on cocoa yield. Data on flora, DBH diameter, total height of the trees as well as on cocoa pod were collected in 60 plots of 400 m2 each. In addition, tree shading, and potential yield were calculated. The results showed that the diversity of agroforestry systems with cocoa trees includes 47 plant species distributed between 41 genera and 20 families. Factorial Multiple Analysis based on associated tree diversity, dimensions and shading has identified three types of agroforestry systems. Light shading systems had the highest cocoa yields (> 1000 kg/ha/year) while the yield with a dense shading varied from 500 to 1000 kg/ha/year. The absence of shading has a negative effect leading to less than 500 kg/ha/year. These results could help promote efficient Cocoa Agroforestry Systems.

In Côte d'Ivoire, since 1980, coffee cultivation has experienced a decline in production due to drought, deforestation and the aging of the orchard. In order to revive this production, practices of replanting and regeneration by coppicing are adopted. The objective is to sustainably improve the production of coffee trees in order to generate added value. Specifically, it is a question of researching the effect of peasant practices on floristic diversity and determining coffee production according to these practices. A study on the effect of cultural practices on floristic diversity and coffee yield was carried out in Kéibla. The practices are: T0 (farmer practice), T1 (replanting + good agricultural practices without fertilization), T2 (replanting + good agricultural practices + fertilization) and T3 (replanting + good agricultural practices + fertilization). Following surface and itinerant surveys, the floristic diversity was determined. Quantitative dendrometric measurements allowed the structural-agronomic characterization. The results showed that the flora is rich with 66 species, 58 genera and 32 families. The analyzes showed that the T1 treatment recorded the best results with a density of 1259 plants/ha, a yield reaching 1041.07 kg/ha, a low mortality rate (23%) and a basal area of ​​33.70 m2. /Ha. In the T1 treatment, the species are diversified and better distributed. Taking peasant farming practices into account makes it possible to improve the production of coffee orchards.

The purpose of this study is to evaluate the diversity of source species of NWFP exploited in the Yapo-Abbé classified forest, and to determine the influence of forest block management on the preponderance of NWFP source species. Ethnobotanical investigations among 95 resource persons belonging to three riparian villages and surface surveys in the forest blocks served as a methodological basis. The results obtained indicate that 62 plant species are exploited by the populations. Five are commercial species replanted. Annickia polycarpa, Landolphia owariensis, Khaya ivorensis, and Eremospatha macrocarpa, the most important species, are threatened by logging, mainly used for NWFP collection. In forest blocks, the diversity and average number of useful species do not vary significantly, despite their difference in degree of exploitation. The Abbé block, the most degraded, but also the most reforested and enriched, has a high proportion of useful species (F = 4.53, p = 0.016). The average circumference of individuals, in relation to the availability of the non-wood resource, is also significantly higher in this block (F = 11.63, p ˂ 0.0001). The management of degraded areas with commercial species with multiple uses has made it possible to increase the proportion of useful species and to maintain them at a certain level of availability comparable to or greater than the least developed areas. Management policies should take into account the integration of multipurpose species or NWFP sources for the sustainability of timber and non-timber resources.

Côte d’Ivoire is the first world producer of cocoa beans and represents 42 % of the world offer. A current reduction of the production is due to numerous constraints and particularly, to diseases and vermin of cacao tree. Documentation dedicated to cacao tree’s enemies in the Centre-West region of Côte d’Ivoire is almost non-existent while this region is the second main cacao zone production. Our study aims to contribute to a better knowledge of the impact cacao tree’s enemies. Three sites of plantations were choosed because of their degraded sanitary state and their easy access for a better follow-up. In 25 squares of 4 m aside, after the floristic inventory, the degree of attack was evaluate by direct observation on each tree. 343 trees were observed and 8 enemies were identified. The strongest infestations are Brown rot, other mushrooms and Mosses (77 - 90%), Swollen shoot (> 50%) and Ants (> 50%). The Swollen shoot and the Brown rot which establish the most alarming enemies on the economic aspect are strongly favored by the proximity with other enemies. These results could serve as reference for control diseases in the cacao plantations and sustainable production.

Germination is the processing of the seed until it becomes a plant. This implies the metabolic Wake thereof after absorbing water followed by imbibition. To determine the germination potential of seeds, after sorting, by direct seeding cultivation of 100 seeds per species 11 herbaceous legumes such as Abrus precatorius, Calopogonium mucunoides, Centrosema pubescens, Clitoria ternatea, Crotalaria goreensis, Crotalaria retusa, Indigofera arrecta Mimosa invisa, Phaseolus adenanthus, Pueraria phaseoloides and Schrankia leptocarpa in nursery bags was performed. The seeding depth was the same for all packets and equal to 1 cm. The density of the semi is 1 seed per bag. Then, the number of species germinated every day and their growth rate were evaluated. From the viewpoint of germination, the length of the lift phase translated dormancy variability of the population of seeds. Different exercised within a relatively short time (4-9 days) helped to note the beneficial effects of mechanical scarification as a treatment applied to seeds. After 35 days of sowing, low survival rates recorded have shown that plants are more sensitive to the vegetative stage at the stage of the adult plant.

In the context of the global change, the loss of biodiversity in the forests-savannas mosaic zone of West Africa constitutes a growing problem. The sale of cashew nuts remains one of the main economic resources of C