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.

This study was carried out to identify categories of ethnobotanical uses of plant in six localities of Gonate county, Central Western Cote d’Ivoire. An ethnobotanical survey based on semi-structured interviews was performed with 165 interviewees. Forty-four plants species including 42 genera and 27 families were recorded. The most used families were Euphorbiaceae, Verbenaceae and Anacardiaceae while Microphanerophyts (26.86%) were the most represented biological types. Plants are specially collected from fields, along the tracks, Forests, markets, and neighboring villages. Populations mainly used plants in four fields. There were Food (45.56%), the most important, Pharmacopoeia (27.98%), Energy (15.11%) and Handicrafts (11.35%). Overall, Tectona grandis was the most used plant with a citation index (IC) of 58.79%. Twenty-four 24 plants including Dioscorea alata (IC = 46.06%), Manihot esculenta (IC = 42.42%), Mangifera indica (IC = 38.18%) and Ceiba pentandra (IC = 36.97%) were moderately used. Regarding Pharmacopoeia field, the pathologies treated with plants were diarrhea, dysentery, stomach aches, ulcers, and abdominal pains, hemorrhoids, infertility and sexual transmitted diseases. These data could help studies to promote and develop conservation strategies for these useful 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.

This study highlighted the symbiosis between Anabaena-azollae cyanobacteria and Azolla aquatic fern in the production of Azolla filiculoides and its use as a biofertilizer. His trial of vegetative production using ordinary water + dung, carried out in 14 days of culture, showed a significant amount (6473g). Then, the use of this one as an amendment for the growth of CB-one rice, showed its positive impact on soil fertility thus translating high yields of CB-one rice contrary to the unamended witness. Indeed, with this treatment, the average number of tillers observed after 56 days of culture, was 18.1 ± 4.23 tillers contrary to the NPK (15.83 ± 4.98) and the control (10, 4 ± 3.27). The average number of leaves was significant in Azolla (57.20 ± 13.45), average for the NPK fertilizer (48.86 ± 15.79) and low for the control (34.83 ± 14, 52). In sum, the trays treated with Azolla filiculoides produced many more panicles and grains compared to treatments. As a result, Azolla is likely to restore soil fertility by providing the soil with the nutrients needed for crop productivity.