The cross-border spaces of the districts of the Plateau are structured by complex activities, territories that are difficult to define but places that contain significant potential and opportunities for development between neighboring States. The objective was to assess the contribution of cross-border exchanges to the local development of the five communes of the Plateau. The quantitative data used concern, among other things, the collection rates of taxes issued in the Plateau department from 2015 to 2019 as well as the monthly income of cross-border trade actors. A total of 390 households were surveyed and 51 resource persons were interviewed during the study. The results obtained reveal that more than half of the players in the trade in manufactured products (55.90%) make a daily profit of at least 50,000 FCFA; (65.13%) of the traders in petroleum products surveyed earn more than 50,000 FCFA; among foreign exchange traders, 80.77% of them derive at least a profit of 5,000 FCFA from the daily execution of their foreign exchange activity. On the social side, 20.51% of the players surveyed said that this activity allows them to meet their basic needs. These points of expenditure are followed by other destinations of benefits such as schooling (15.38%), the purchase of means of transport (13.08%), the construction of housing on a rental or individual basis (12. 31%), ceremonies (11.54%) and savings in banks and/or micro-finance institutions (7.44%). It also contributes to the revenue of the local community through the taxes paid by the actors.

The present study has as objective to contribute to better knowledge of these curative plants with a view to establishing a data bank. Data were collected based on questionnaire structured and semi structured to 235 individuals constituting the unpredictable sampling and belonging to three categories socio professional. In total, one drew up an inventory of 160 kinds of curative plants flat 65 families and 139 types. The family of Leguminosae is the most representing with 11 kinds of plants. Four curative plant kinds have a Relating Frequency of Quotation very significant (RFC), it is between other one of kinds Gardenia ternifolia (RFC = 0,98) and Pteleopsis suberosa (RFC = 0, 91). Besides, 42 other kinds have a degree of consensus on the very significant treatment (IAR) such as Senna occidentalis, Acanthospermum hispidum, Lannea barteri. Variables such as: age, sex, and religion constituted a factor determining in the knowledge of kinds for the treatment of diseases in the middle of study (P < 0,05). The majority of the investigating devote themselves more to the use of curative plants as practices adopted in case of diseases. It is therefore important that the conditions of working and of conservation of aforementioned plants are improved for the improved well-being of our populations which remain tied to traditional morals.

This research aims to analyze the state of conservation of gazetted forest, community forest and sacred forest in the southern Benin. To do this, two gazetted forests, two communities forests and two sacred forests were chosen. The evaluation of the dynamics of the forest cover has been made of the comparative diachronic analysis of land cover in 1982 and 2015. The phytosociological and forest inventories were carried out in the forests studied. The results revealed that the areas of forest classes are held and sometimes experiencing an increase in the sacred forests while these forest classes experienced a regressive development in gazetted forests. In community forests, regression and maintaining forest classes were observed. The average density of trees is the highest recorded in the sacred forest of Zannouzoun (352.50 trees / ha) and the lowest density is achieved in the community forest Togbin-Daho (104.60 trees / ha). The highest Shannon diversity index is obtained in the sacred forest of Kodjizoun (3. 08 bits) while the lowest value of this index is recorded at the gazetted forests of Pahou (1.96 bit). The state and the evolutionary trend of forest cover and ecological parameters show that the sacred forests and incidentally community forests are best preserved as gazetted forests. However, the small size of sacred forests requires to qualify this conclusion.