The cashew sector has taken a great economic interest, due to the strong global demand for raw nuts. However, in Burkina Faso, the productivity of orchards still remains low, a consequence of a lack of breeding program on the species. In order to increase yields and improve the quality of the raw nut, efficient clones must be developed. Surveys were carried out and a primary in situ collection was made from which a core collection of 15 trees was extracted. An agro-morphological description of the selected trees and an analysis of the structuration of the variability within them were carried out. The study revealed appreciable agro-morphological diversity through shape, size and color of apple, type of inflorescence, fruiting period and the health of trees. A structure of diversity based on agronomic criteria led to identify 5 groups of trees, characterized by an average weight of the nut between 6.64 and 8.32 g, a kernel rate between 28.10 and 31.26% and a yield per tree between 34.27 and 104.42 kg. Performing trees will be erected as heads of clones for the production of grafted plants. La filière anacarde a pris un grand intérêt économique, suite à la forte demande mondiale en noix brutes. Cependant, au Burkina Faso, la productivité des vergers demeure encore faible, conséquence d’une absence de sélection variétale du matériel végétal. En vue d’accroître les rendements et d’améliorer la qualité de la noix brute, une recherche de clones performants était indispensable. Des prospections ont été conduites et une collection primaire in situ a été constituée dont une core collection de 15 arbres a été extraite. Une description agro-morphologique des arbres sélectionnés et une analyse de la structuration de la variabilité en son sein ont été conduites. L’étude a révélé une diversité agro morphologique appréciable à travers la forme, le calibre et la couleur de la pomme, le type d’inflorescence, la période de fructification et l’état sanitaire des arbres. Une structuration de la diversité basée sur les critères agronomiques a permis d’identifier 5 groupes d’arbres, caractérisés par un poids moyen de la noix compris entre 6,64 et 8,32 g, un taux d’amande compris entre 28,10 et 31,26% et un rendement par arbre compris entre 34,27 et 104,42 kg. Les arbres les plus performants constitueront des têtes de clones pour la production de plants par greffage.

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The lack of cool storage rooms causes enormous losses of bulbs for a great number of onion growers. An assessment is done to determine the effects of growing season and the size of onion bulbs on their storage life. The trial was carried out in Ouahigouya in Northern Burkina Faso, in the Sudano-Sahelian climatic zone. Onion bulbs were grown in two different seasons and sorted into classes according to the one bulb weight. According to the growing season of bulbs, the late season is better than the normal season. Over 150 days of storage, the percentages of weight losses were 49.3 ± 3 % for the bulbs from late season and 57.7 ± 1.8 % for those from normal season. According to the size of bulb, the large bulbs have recorded more weight losses (85.6 ± 1.3 %) than medium bulbs (77.9 ± 0.5 %) or small bulbs (79.0 ± 2.9%), over a time of 240 days of storage. These results are useful for the storage of onion bulbs at room temperatures. They will help producers to optimize the losses of bulbs and to make more profit by keeping their harvest until to carry best market prices.