Alexandre Dansi

University of Abomey-Calavi | UAC · Faculty of Science and Technology (FAST)

Technique de reconnaissance des variétés locales de haricot commun (Phaseolus vulgaris L.) cultivées au centre du Bénin

Technique de reconnaissance des différents types de piment (Capsicum annuum L.) cultivés au Bénin

Etude ethnobotanique de haricot igname africain ( Sphenostylis stenocarpa ) dans l’aire culturelle yoruba au Sud Bénin

The pulse beetle Callosobruchus maculatus Fabricius (Coleoptera: Bruchidae) is an important pest of stored soybean grains. It is imperative to screen out the prevailing genotypes of Beninese soybean cropping systems in order to find out the resistant ones against C. maculatus infestations. The effect of seven grain physical traits (testa thickness,...

To meet the high demand for white Guinea yam, there is a need to develop and release improved varieties to farmers. Unfortunately, low rate of adoption of most of the improved yam varieties by both producers and consumers was observed. Information regarding agro-nomic characteristics and food qualities of popular white Guinea yam landraces with hig...

Genetic diversity studies provide important details on target trait availability and its variability, for the success of breeding programs. In this study, GBS approach was used to reveal a new structuration of genetic diversity and population structure of pigeonpea in Benin. We used a total of 688 high-quality Single Nucleotide Polymorphism markers...

Taro and new cocoyam are root and leaf crops commonly grown in tropical to warm temperate regions. In Togo, they are neglected and underuti lized. Here we report the genetic diversity of 26 accessions of taro and 101 accessions of new cocoyam. Analysis of simple sequence repeats revealed low polymorphic information content of 0.43 and 0.25 in taro...

White Guinea yam (Dioscorea rotundataPoir.) is indigenous to West Africa, a region that harbors the crop’s tremendous landrace diversity. The knowledge and understanding of localcultivars’ genetic diversity are essential for properly managing genetic resources, conservation, sustainable use, and their improvement through breeding. This study aimed...

Termites are considered as important pests of maize plantations in Republic of Benin. However, very little information is available on their assemblage composition, abundance, damages, and on the sensitivity of common maize varieties in Benin. This study aims to fill these gaps and provide baseline for the development of an integrated termite manag...

The scarlet eggplant (Solanum aethiopicum L.) is an African traditional vegetable grown for its edibles leaves and fruits, which can contribute to food security in Republic of Benin. However, very little information is available on the genetic variability of this vegetable for varietal improvement purposes. Sixty accessions of scarlet eggplants col...

The sweet pea or tigernut (Cyperus esculentus L.) has very high potential to be developed but is considered a neglected and underutilized plant in Benin. The current study aims to investigate the indigenous knowledge related to local diversity, production and uses of various landrace types of tigernut grown in its production areas in Benin. Using P...

Soybean (Glycine max L. Merr) is a legume that contributes to food security and poverty reduction in Benin. Unfortunately, its culture is subject to several undocumented constraints that contribute to decline in productivity and a loss of diversity. Therefore, documentation of production constraints, varietal diversity seed system and traditional u...

The African eggplant (Solanum aethiopicum L.) is an important traditional vegetable cultivated in tropical regions for its edible fruits. In the Benin Republic, S. aethiopicum is mainly cultivated by rural farmers for food and for its use in traditional medicine. Assessing varietal diversity, endogenous knowledge, production constraints and farmers...

Description du sujet. En Afrique de l’Ouest, les tubercules d’igname sont principalement consommés sous forme pilée. Cependant, vu la forte périssabilité des tubercules frais, la consommation de l’igname pilée tout le long de l’année est une préoccupation majeure. La transformation des tubercules en produits stables tels que la farine instantanée e...

Background: Lippia multiflora Moldenk is a shrub that is present in Benin. It is used as nutritious food and its leaves and flowers are rich in mineral salts and especially vitamin A and C. Also, these leaves and flowers transformed into powders, are sold and used to flavor sauces and for other purposes. Aim/Objectives: Our work aims to provide con...

Background: Pigeonpea is a multipurpose food legume that contributes to food security in Benin. However, its production declined and some landraces are being threatened to disappear. For establishment of conservation and breeding programs previous ethnobotanical surveys on pigeonpea were done in Benin but restricted to south and central regions. Kn...

Peanut (Arachis hypogaea L.) is one of the major oilseed legumes contributing to food security in Benin. Unfortunately, several constraints hamper its production leading to a low yield. A good knowledge of on-farm management of peanut diversity and uses that allow its maintenance in traditional Beninese agriculture are prerequisites to establish an...

Forty-eight cultivars (44 landraces and 4 hybrids) of white yam (Dioscorea rotundata Poir.) selected as parents for a breeding program in Benin were evaluated for proximate, sugars and mineral composition using standard AOAC methods. The results revealed a great variation among cultivars for fat (2.4-18 mg/g), protein (0.40-19.31 mg/g), total sugar...

Pigeonpea (Cajanus cajan L. Millspaugh) is a neglected and under-utilized crop consumed in several regions of word. In order to assess performance of pigeonpea landraces grown in Benin for useful breeding programs, 50 accessions were collected from 39 villages. These accessions were characterized by using 12 qualitative and 11 quantitative traits....

Corchorus olitorius L. is a traditional leafy vegetable that contributes to food security and poverty reduction in Benin. Various stresses as well as absence of improved seeds lead to low yield and threaten its diversity. In order to develop a genetic improvement program for this vegetable, an evaluation of the genetic diversity of jute cultivars i...

Cultivating plant mixtures is expected to provide a higher productivity and a better control of pests and diseases. The structure of the arthropod community is a major driver of the magnitude of natural pest regulations. With the aim of optimizing pest management, a study was carried out to determine the effect of the cropping system type (tomato m...

Dioscorea dumetorum (Kunth) Pax is a yam species of great potential but so far scientifically neglected in Benin Republic. Using participatory rural appraisal (PRA) tools and techniques, thirteen (13) villages selected according to the importance of species production in the northern and central Benin were surveyed to assess the endogenous knowledg...

In Benin, yam (D. cayenensis- D. rotundata complex) hold a prominent position in the diet and economic sector. Dry rot caused by Scutellonema bradys is one of the major concerns affecting diversity and resulting in significant losses to farmers. To assess the current cultivar diversity in the traditional agriculture and the importance of the cultiv...

Common bean (Phaseolus vulgaris L.) is an important food consumed in every region in Republic of Benin; however, it remains a neglected and under-utilized crop. In order to assess the value of bean germplasm of the central region in the Republic of Benin for useful breeding programs, 57 accessions were collected from 23 villages. After a classifica...

In Benin, stored yam chips are severely attacked by Dinoderus porcellus Lesne which causes important losses. The use of medicinal plants combined with the insect-resistant yam chips can be an efficient alternative of chemical insecticides for yam chips protection. This study aims to evaluate an integrated pest management of D. porcellus using combi...

Bambara groundnut (Vigna subterranea (L.) Verdc.) is one of the important legume crop grown in marginal soils of sub-Saharan Africa. Despite its importance in food security and income generation for small scale farmers, it remains as a neglected and underutilized crop and the productivity is very low in the field due to the lack of improved varieti...

Common bean (Phaseolus vulgaris L.) is a legume that contributes to food security and poverty reduction in Benin. However, there is very little information on its production constraints, varietal diversity, storage practices, storage insect management, and seed system. While these information are necessary for use in breeding programs and a better...

Sweet potato (Ipomea batatas L.) is a food plant which contributes significantly to food security and poverty reduction around the world. To document its production constraints, cultural practices, diversity, varietal preference criteria, landraces'performances and seed management, a survey was conducted in 28 villages of the northern Benin. A tota...

Taro (Colocasia esculenta L. Schott) and tannia (new cocoyam) (Xanthosoma mafaffa L. Schott) are food crops cultivated in tropical and subtropical regions of Asia, Africa and Latin America. In cultivation, they are always vegetatively propagated and their production faces many constraints. Their corm is an important source of carbohydrates and leav...

Cultivated plant diversity reveals many potential advantages such as higher overall productivity, better control of pests and diseases (Ratnadass et al. 2012), enhanced ecological services, and greater economic probability (Malézieux et al., 2009). In Benin, like most tropical crops, tomatoes are grown in cropping systems with a wide range of diver...

This study aims to show the influence of the agricultural practices and the composition of the landscape on the arthropods communities and their implication in the regulation of the banana weevil Cosmopolites Sordidus. To achieve our objectives, we explored four villages in the district of Toffo (Benin / West Africa) where Musa production is high....

Corchorus olitorius L. is one of the traditional leafy vegetables of high food and socio-economic value in Africa. Although widely exploited, its varietal diversity is unknown and its domestication remains challenged by pests and diseases presently observed among subsistence users. This study aims to determine the morphotype diversity of C. olitori...

Bambara groundnut (Vigna subterranea (L.) Verdc.) is a neglected and less exploited species in Benin. However, the rational use of the different landraces available involves an appropriate knowledge of their characteristics. This study examined the characteristics of 52 local landraces of Bambara groundnut traditionally cultivated in Benin based on...

Cassava (Manihot esculenta Crantz) is an important food security crop or resource for poor rural communities particularly in Africa. The crop’s ability to produce high yields even under poor conditions and storability of its roots underground for longer periods or until needed makes it a model ‘food security crop’. In Benin Republic, cassava has be...

Variability study of agro-morphological characteristics is important for varietal improvement and plant breeding program. For this, 148 chili pepper landraces (Capsicum annuum L.) collected from Northern Benin were characterized using 39 (21 qualitative and 18 quantitative) morphological characters. The trial was conducted in a Fisher block design...

Guinea yam (Dioscorea cayenensis–D. rotundata complex) is an important tuber crop that highly contributes to food security and poverty alleviation in Benin. The knowledge and understanding of the extent of genetic variation of Guinea yam germplasm is important for planning of the genetic conservation, and the utilisation of this resource. The objec...

Jute mallow rich in proteins, vitamins and essential amino acids is an important leafy vegetable in Africa. Ethno-botanical knowledge on the crop in Ghana has been only incompletely documented and little is known about variation and diversity of local accessions. In order to document available ethnobotanical knowledge and investigate diversity of l...

Sweet potato is an important staple food in Benin, which unfortunately remains neglected by research and underutilized. To document the diversity of the crops for its sustainable conservation and use, an ethnobotanical investigation was conducted in 34 villages selected in Central and Southern Benin using participatory research approach methods and...

Dioscorea praehensilis Benth. make up an important yam that contributes to food security and poverty alleviation in some countries of west and central Africa. In spite of its huge economic potential and as a source of food security, D. praehensilis locally called bayere still remains an underutilized in Togo. This study was carried out to assess th...

Dinoderus porcellus is considered as the most important pest of stored yam chips and compounds extracted from plants can be used for its control. The present study aimed to test the insecticidal and repellent activities of powders and extracts of leaves of Bridelia ferruginea, Blighia sapida, and Khaya senegalensis against D. porcellus. The efficac...

Cassava (Manihot esculenta Crantz) is one of the major root and tuber crops contributing to food security and poverty alleviation in Togo. Unfortunately, its cultivars diversity is still not known and has even never been assessed and documented countrywide for use in breeding and development programs. To fill this gap of knowledge, 40 villages rand...

Although maize is an economic crop among agroecological zones in Benin, there is a limited information on its varietal diversity, production constraints and ethnobotanical knowledge. To fill this gap, ethnobotanical survey was conducted among 51 communities from 22 ethnic groups randomly selected from 11 departments in Benin using participatory rur...

A r t i c l e I n f o Maize (Zea mays L.) constitutes the basis of food security in the poorest zones of Africa. One of the limiting factors of its production is soil phosphorus deficiency. In this study, 134 maize genotypes collected in different localities of Benin were assessed with three phosphorus doses (0, 50 and 100 kg/ha) along with known t...

Objective: The objective of this work is to identify all the local varieties of okra grown in Benin to determine their agro-morphological characteristics. Methodology and Results : The study was conducted through ethnobotanical surveys of 760 producers okra through 31 races. A total of 24 and 480 common names and designations are used to designa...

Cassava (Manihot esculenta Crantz) is one of the highly produced and consumed food crops in Benin Republic. Through the application of participatory research appraisal tools and techniques, such as direct observations, group discussions and field visit, cassava production constraints, the diversity at the community level and farmers’ varieties pref...

Chili peppers play a significant role in the world diet and can contribute to the improvement of horticultural producers’ incomes. In Benin, chili pepper production is hampered by many challenges that need to be characterized, prioritized and addressed. Moreover, the existing diversity, as well as the agronomic potential, of the varieties being cul...

The functional response and some predation parameters of the predators Alloeocranum biannulipes Montrouzier & Signoret (Hemiptera: Reduviidea) and Teretrius nigrescens Lewis (Coleoptera: Histeridae) were evaluated at five different densities of larvae and pupae of Dinoderus porcellus Lesne (Coleoptera: Bostrichidae) with the aim to understand their...