The present study aims to highlight the effects of different planting densities on the control of groundnut rosette under the agro-ecological conditions of Kenge. The study was conducted in the Democratic Republic of Congo, Kwango Province, in the city of Kenge. For this study, we used an experimental approach combined with statistical analysis. The experimental design was a 2 × 4 factorial in a split-plot arrangement with four treatments and three replications: T0 = random spacing, T1 = 20 cm × 20 cm, T2 = 40 cm × 20 cm, and T3 = 30 cm × 30 cm. The results showed that T1 (20 cm × 20 cm) achieved the best performance, with a lower incidence and less severe attacks compared to the other treatments. It was followed by T0 (random spacing), which gave results similar to T1. Lime amendment also proved important, providing better results on the plots where it was applied compared to plots without lime. These findings suggest that higher planting densities help control the aphid Aphis craccivora and combat groundnut rosette.

This study is carried out with the aim of collating the local impacts of climate change in the coastal area of ​​Muanda in the DRC. Three pilot villages are selected because of their accessibility and ease of communication. Resource persons are sorted on the basis of level of study. For each village, 25 people are chosen, making a total of 75 for the three villages. Interviews and plenary sessions supplemented information on the local perception of climate change, as well as the vulnerability assessment.To assess the impacts of climate change, climate scenarios at the local (Muanda area) and regional (Africa) scales were evaluated using the Magicc/Scengen 5.3 software over a period of one hundred years, at the beginning of the century, in the middle of the century and towards the end of the century. Only the temperature variable is taken into account. The results revealed that the neighbouring inhabitants locally perceives and interprets the impacts of climate change through sea level rise, coastal erosion, the decline in fish and agricultural products, and drought. The projections also show that the temperature will only increase over time.

This study is carried in Kinshasa, provincial city in Democratic Republic of Congo, with the aim of inventorying the floristic richness of certain protected sites in order to preserve nature. The transect method with a double advantage, that of saving time and considerable cost, made it possible to collect data by direct observation (visual contact with the tree) and to determine the plant species inventoried. The plant species were identified using the combination of various determination keys. The results obtained were then supplemented by information concerning the ecological types, which enabled us to identify 80 genera and 89 plant species divided into 48 families according to the APG IV classification. The most represented families in number of species are those of Rubiaceae and Fabaceae visibly with 8 species or 9% against 7 species or 8%. The most represented species in number of individuals are Markhamia tomentosa (40 feet) or 8.6%, Strychnos variabilis (33 feet) or 6.4%, Oncoba welwitchii (30 feet) or 5.8%, Rhabdophyllum arnoldianum (25 feet) or 4.9%, Allophylus africanus (25 feet) or 4.9%, Hymenocardia ulmoides (21 feet) or 4.1% and Pentaclethra eetveldeana (17 feet) or 3.3%.