Cowpea, Vigna unguiculata [L] Walp, is one of the most important grain legume grown in all arid and semi-arid regions of Africa. It contributes to reduce malnutrition and poverty and to achieve food security as well. However, cowpea production is hampered by many biotic and abiotic stresses which include viral diseases. Cowpea mosaic caused by CABMV is the main viral disease of cowpea in Africa. This study aims to determine the CABMV transmission rates through seeds describe the reaction of different cowpea genotypes to the virus and identify sources of resistance to serotype D of CABMV. A variation of seed born transmission of CABMV from 3% to 100% was observed for the varieties B301 and Kvu150. Inoculation of cowpea seedling with CABMV results in pods drop leading to yield loss. A negative correlation (r = - 0.33) was observed between date of onset of symptoms and hundred grains weight. The severity of symptoms varied from one cultivar to another. Thus, the best genotypes were those who had better production namely Kvx780-4 SH (28.08 g), Kvx780-3 (21.52 g), Kvx780-9 (20.31 g) and Gourgou (20, 02 g).

Forty-one (41) accessions of the jute potager (Corchorus olitorius L.) collected in Burkina Faso were evaluated on July 2014 with twenty-five (25) characters according to a Latinized Apha-Plan. The global objective of this study is to contribute to a better knowledge of the agromorphological diversity of C olitorus of Burkina Faso. The study revealed that 75,61% of the accessions studied belong to C olitorius var olitoriu L. variety and 24,39% belong to C olitorius var incisifolius Asch.& Schw variety. It showed indeed that several characters discriminate the accessions at 1%. The study of the structuring of diversity revealed three groups of accessions on the basis of the plant height, stem diameter, width of leaf and leafy biomass. Thus, the group I is constituted of big size accessions with robust stem, high leafy biomass and thin fruits. The Group II is constituted of individuals with performances relatively low. The Group III is a mixed group constituted with 65% C olitorius var clitoris L. and 35% of C olitorius var incisifolius Asch. & Schw. This group is made up of individuals with reduced size, with weak leafy and big fruits.

The objective of this study is to contribute to a better knowledge of the agromorphological diversity of Cleome gynandra L. of the West of Burkina Faso. Hundred accessions, collected in the vegetable gardens and the natural populations of the sahelo-soudan zone and the soudan zone of Burkina Faso, was evaluated according to a Latinized Alpha-Plan design. Observations and Biometrical measurements were carried on 23 variables. The study revealed a great agromorphological variability within the accessions from the vegetable gardens and those collected in the natural populations. 17 characters - 11 quantitatives and 6 qualitatives discriminate the studied accessions. Highly significant differences at 1% were observed between the accessions of the two climatic zones and between the accessions from the vegetable gardens and those collected in the natural populations. The agronomical performances of the accessions from the sahelo-soudan zone are higher than those of the accessions from the soudan zone. Also, the performances of the accessions from the vegetable gardens are higher than those from the natural populations. Several positive correlations were observed. The study of the structuring of the diversity of the accessions revealed two great sets. The first set is mainly constituted with cultivated accessions and accessions from the sahelo-soudan zone. The second set is mainly constituted with accessions collected in the natural populations and of accessions from the soudan zone. Thus, the growing practices and the climatic zones were the determining factors in the structuring of the diversity of the studied accessions.