Environment

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https://datad1.aau.org/handle/123456789/1385

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Browsing Environment by Subject "Aboubacry Kane"

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    MYCORRHIZAL STATUS OF CULTIVATED AND WILD PEARL MILLET (PENNISETUMGLAUCUM (L.) R. BR) IN THREE AGRO-ECOLOGICAL ZONES OF SENEGAL
    (International Journal of Development Research, 2020-12-10) Mofini, Marie-Thérèse; Diedhiou, Abdala G.; Niaye, Cheikh
    Pearl millet (Pennisetumglaucum (L.) R. Br) is a cereal grown in the driest tropical and subtropical regions of Africa and Asia. Thanks to its strong capacity to adapt to the dry tropical climate and low fertility soils, millet plays an important role in the food security of local populations in these regions. It is able to establish a mycorrhizal symbiosis with arbuscular mycorrhizal fungi (AMF), which play a key role in the absorption of nutrients and the mitigation of abiotic and biotic stress in their host. We first evaluated the mycorrhizal status of cultivated and wild millet in three agro-ecological zones of Senegal by following a rainfall gradient and then the effect of inoculation with AMF on the growth of cultivated millet. We found that wild and cultivated millet establishedarbuscular mycorrhizal symbiosis but a low rate of mycorrhizationwas observed. The frequency of mycorhization was significantly higher in cultivated than in wild plants. We then evaluated the impact of AMF inoculation on plant growth and found very limited impact. These results suggest that millet is not very dependent on mycorrhizae although AMF may stimulate its growth.
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    Study of the Cowpea (Vigna unguiculata) Conservation System in the Groundnut Basin (Commune of Niakhar)
    (Original Research Article, 2021-09-25) CISSE, Alpha; Dia, Souleymane; Ndiaye, Fatoumata
    Post-harvest food preservation remains a major constraint. However, producers in the area resort to the use of chemical or natural products to fight against pests. It is in this perspective that the present study is inserted, which aims to diagnose the cowpea conservation system in the commune of Niakhar. A survey was conducted in three villages, based on a questionnaire aimed at understanding farmers' perceptions of post-harvest cowpea conservation. The analysis focused on the incidence of insects and the estimation of losses, the conservation method and sanitary prophylaxis. The results showed that women were more involved in conservation activities than men, with 67% and 14% respectively. Indeed, the insects that cause more damage belong to the Bruchideae family, including Callosobruchus maculatus, which is the pest that causes serious damage to stored cowpeas, and Bruchidius atrolineatus respectively (80.5%) by Callosobruchus maculatus and (19.5%) by Bruchidius atrolineatus. These insects can cause losses of 15%, 30% and more than 75%, and even 100% of post-harvest losses. However, the conservation methods used are plastic barrels (19.4%), plastic bags (2.8%) and other methods are used by (72.2%). The conservation in seeds is done by (94%) of the producers and (6%) do it in pods.