Ousmane N Coulibaly

Ousmane N Coulibaly
Consultative Group on International Agricultural Research | CGIAR · Bioscience Center (IITA)

Ph.D

About

96
Publications
109,413
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
2,011
Citations

Publications

Publications (96)
Article
Full-text available
This study assesses the financial value of one hectare of savannah vegetation in Sudanian region of West Africa based on the potential extraction of Non Timber Forest Products (NTFPs). Our methodology provides multiple estimations of NTFPs production from each species for two years and also takes into account variation in NTFPs prices. Given the re...
Chapter
Access to up-to-date information on market prices and quality requirements remains a key issue for smallholder farmers’ access to high income markets. The aim of this chapter is to explore the problem of information asymmetry between farmers and buyers in the pineapple supply chain in Benin, and to assess strategies using mobile phones to overcome...
Article
Full-text available
Papaya is an emergent food and cash crop in Western Africa. It is used as an export crop in Ghana and for urban consumption in Benin. Papaya fruits are severely attacked by Papaya mealybug causing significant losses in quantity and quality. To control the papaya mealybug a classical biological control initiative has been developed and is environmen...
Article
Several efforts have been made through research, government programs and Non-Governmental Organisations (NGO) interventions to improve yam production in Nigeria. In addition, some policies targeted at improving agricultural production have weakened the production and consumption of different commodities, especially yam. This study analyzed the effe...
Article
Full-text available
Genetically modified (GM) crops could increase economic growth and enhance living standards in Africa, but political issues have slowed the use of biotechnology. This is the first study that assesses the potential impact of GM crops in Africa while considering the preferences of producers and consumers towards GMOs as well as the income and price r...
Article
Full-text available
This present study analyses gender and governance in the rice and vegetable-based value chain systems in 3 lowlands of southern Benin and 2 lowlands in Southern Mali. A sample of 243 farmers, 1 modern processing unit, 18 traditional processors, 76 traders and 8 national institutions were interviewed in Benin and Mali. Descriptive statistics and Har...
Article
Full-text available
This article aims at analyzing Beninese smallholder famers’ selection of high value markets, such as export and processing-oriented marketing channels, in the pineapple supply chain. Four main marketing channels were investigated: rural, urban, and export fresh pineapple markets and processing-oriented markets. Primary data collected from 285 pinea...
Article
This study is based on interviews with 3456 randomly selected cowpea farmers in 322 villages in ten countries in West and Central Africa in 2010 and 2012. It uses descriptive statistics to track the trends in adoption of cowpea storage technology compared to previous studies and Firth logistic regression to identify important factors in adoption. T...
Article
The Purdue Improved Cowpea Storage (PICS) technology has been disseminated in 30,896 villages in 10 different countries in West and Central Africa from 2007 to 2012. Extension and supply chain development efforts were required to make the PICS technology available to millions of farmers and other users. Several research and development organization...
Article
Full-text available
An information systems-adapted Contingent Valuation survey was used to assess smallholder farmers' perceptions and the premium they are willing to pay (WTP) to get mobile phone-based information on market prices and product quality to overcome the recurrent information asymmetry issues in the chain. The investigations, consisting of an exploratory...
Article
Full-text available
We analyze the contribution of Parkia biglobosa fruit harvesting as source of income for local communities around the Pendjari Biosphere Reserve in Benin and the role that this exploitation plays in improving the conservation status of this species. We interviewed 124 farmers in five villages and conducted field surveys on 80 plots of 50 m* 50 m. R...
Article
Full-text available
Mango (Mangifera indica L., Anacardiaceae) is a popular fruit in Africa because of its high nutritional and economic value. However, smallholders in Benin, a West African country, are currently unable to take advantage of this potential because of various constraints along the value chain. A survey with 150 mango producers in three agro-ecological...
Article
Full-text available
The present study validates the new construct “Multi-governance choices”, to sharpen our understanding of how and why smallholder farmers select among alternative governance structures. Primary data were collected from a sample of 219 pineapple farmers in Southern Benin. Results from a multivariate probit model analysis showed that farmers involved...
Article
Full-text available
Résumé L’amélioration des revenus des transformatrices passe par un bon positionnement des amandes et du beure de karité sur le marché international. Les produits du Bénin sont achetés trois fois moins chers que ceux du Ghana. La correction de cette situation passe par le développement et l’adoption de technologies appropriées. La connaissance et l...
Article
Full-text available
Shea butter, a fat from the nuts of shea tree, is of great nutritional and commercial value for local communities of Africa. The sanitary and physicochemical qualities of shea butter sold in Benin markets are unknown. This study assesses the quality characteristics of 54 samples of shea butter collected from eight markets in Benin, West Africa. Tot...
Chapter
Full-text available
Cowpea farming practices have been ongoing for millennia and have always faced various challenges including diseases, insects, and weeds, that lower its yield to no more than 200 kg/ha. This economically and nutritionally important crop has been a major research focus of the International Institute of Tropical Agriculture (IITA) and of several nati...
Article
Full-text available
In Benin, a study is focused on the causes of the vulnerability and the risks of the potential spread of the pandemia the HIV/AIDS due to the existence of agribusinesses in the rural communities. The Benin sugar company and the cotton shelling factory of Hagoumey are the two selected factories. The survey was conducted with 190 respondents selected...
Article
Full-text available
Recently, HIV/AIDS has been considered as a development problem in Sub-Saharan Africa. The main issue now is the identification of suitable activities which could enable the affected households to maintain appropriate livelihoods. In order to identify such activities, this study was conducted in the four agro-ecological zones of Southern-Benin and...
Article
Full-text available
Résumé La production des légumes nécessite une forte utilisation de pesticides chimiques par les maraîchers. Toutefois, les pesticides ont des effets négatifs sur la santé humaine et l’environnement. L’introduction des méthodes alternatives de contrôle des parasites permet de produire des légumes de façon biologique, encore appelés légumes sains. L...
Article
Full-text available
Vegetable production plays an important role in food security and provides food and raw materials for industries, income from sales, and employment for small households in urban and peri-urban areas in West Africa. However, some significant health hazards may occur due to misuse of chemicals pesticides applied during vegetable production. Reducing...
Article
Full-text available
Storage conditions are key constraints for quality assurance of the shea (Vitellaria paradoxa Gaertner) butter. In the Sudan savannah Africa, storage conditions of butter produced by women vary across and among processors, traders and consumers. These conditions could impact the quality of the products and reduced their access to international mark...
Article
Full-text available
Résumé Le modèle Logit multinomial est utilisé pour analyser les facteurs influençant le choix des méthodes alternatives de contrôle des insectes au Bénin et au Ghana. Au total 275 maraîchers y compris les femmes sont sélectionnés au Bénin et au Ghana. Les résultats ont montré que la majorité des maraîchers reconnaisse les chenilles des insectes co...
Article
Sustainable use (in terms of nutrients) of soil resources by farmers in Sub-Saharan Africa is constrained by institutions and markets. This paper explores the case of northern Nigeria, by using a combination of multi-attribute utility theory and bio-economic modelling. This approach allowed us to identify heterogeneity in production strategies and...
Article
Full-text available
Bananas and plantains (Musa spp.) play an important role in the diet of people in Central and West Africa. In Cameroon and Southern Nigeria, a comparative study was carried out in 480 households to assess the frequencies and levels of consumption of banana and plantain-based foods commonly consumed by children under five years-old and their mothers...
Article
Full-text available
Résumé Les mauvaises méthodes de stockage des céréales et des légumineuses augmentent le risque de contamination par l’aflatoxine. Cette toxine constitue une réelle menace pour la sécurité alimentaire. Pour relever ce double défi à la fois sanitaire et économique, le Bénin n’a qu’une seule alternative : prévenir la contamination par les technologie...
Article
Full-text available
Abstract The pandemic of Human Immunodeficiency Virus (HIV) affects the most active population – the young – and weakens the agriculture sector which remains the main economic hub in Benin. However, few studies focused on the impact of this pandemic on agriculture and on farm households’ livelihoods in the country. In order to fill such a gap, this...
Poster
Full-text available
A trial was carried out in Benin, West Africa to test the effectiveness of PICS Bags for controlling post harvest insects, of cassava chips and to evaluate the cost/benefit of this technology. Firsts results after 2 months of storage showed that losses were significantly higher in Polypropylene bag (PPB) the main traditional method used by traders...
Presentation
Full-text available
Maize Stored Pests Control by PICS-Bags: Technological and Economic Evaluation
Article
Full-text available
Household characteristics are commonly used to explain variation in smallholder efficiency levels. The underlying assumption is that differences in intended behavior are well described by such variables, while there is no "a priori" reason that this is the case. Moreover, heterogeneity in farmer goals and preferences, in relation to the role of the...
Article
Full-text available
The use of synthetic pesticides among vegetable producers in urban and peri-urban Cotonou, Benin, has been increasing to the extent that certain insect pests have developed resistance to the pesticides. This paper assesses the impact of the farmer field school approach in an integrated pest management (IPM) project that aimed to increase IPM knowle...
Article
Cowpea is an important crop among the farm households of northern Ghana. It provides a cheap source of plant protein and bridges a hunger gap that is known to exist between the time when most crops are planted and the time when major crops are harvested. However, the cultivation of cowpea is constrained by several factors, with pests and diseases b...
Article
Full-text available
Estimating the Local Value of Non-Timber Forest Products to Pendjari Biosphere Reserve Dwellers in Benin. This paper uses an indices method based on participant ranking of species to quantify use–values of Non-Timber Forest Products (NTFPs) and the socio-economic factors that influence these values for people living around the Pendjari Biosphere Re...
Conference Paper
Full-text available
Household characteristics are commonly used to explain variation in smallholder efficiency levels. The underlying assumption is that differences in intended behavior are well described by such variables, while there is no a priori reason that this is the case. Moreover, heterogeneity in farmer goals and preferences, in relation to the role of the f...
Article
Full-text available
Introduction. In the southern Sudanian zone of Benin, fruit flies are major pests and responsible for considerable yield losses in mango production. The two main species of economic importance affecting mango trees in Benin are Ceratitis cosyra and Bactrocera invadens. During the 2006 crop year and across seven main cultivars, losses stood at 17% i...
Article
This study examined the dynamics of fresh yam tuber prices and applied a hedonic pricing model to estimate the market values of tuber characteristics in two consumption centers in Togo. Real prices were modeled as a function of variables measuring yam species, physicalattributes of tuber, origin of production, market location, and time of the year...
Chapter
Cowpea (Vigna unguiculata var. unguiculata) ((L.) Walp.), a crop native to Africa, is the most important legume grown on the continent, at least in terms of economics. It is a highly nutritious crop, consumed in many forms, including seeds as well as foliage; it provides excellent fodder for livestock as well. Well-adapted to the semi-arid tropics,...
Article
While it is widely recognized that agricultural research is a key driver of broad-based technological change in agriculture that benefits the poor in many different ways, little is known about its aggregate impacts on productivity growth and poverty reduction in sub-Saharan Africa (SSA). Using a polynomial distributed lag structure for agricultural...
Article
Full-text available
Insecticide resistance in Anopheles mosquitoes is threatening the success of malaria control programmes. This is particularly true in Benin where pyrethroid resistance has been linked to the failure of insecticide treated bed nets. The role of mutations in the insecticide target sites in conferring resistance has been clearly established. In this s...
Article
Full-text available
This paper assesses the effects of the marketing of seven commonly-used medicinal plants on their sustainable use. Data were collected from a sample of 100 marketing agents by direct interviews and ANOVA (analysis of variance) was used to test profit margin distribution across actors involved in the marketing of medicinal plants. Results show that...
Article
This study uses the Box-Cox (BC) transformations to examine nonlinearity in price modeling and compare results from several functional specifications in hedonic price analysis of yam in Togo. Based on a sample of 6,402 observations on price and produce characteristics generated through a market experiment, it is found that the BC quadratic asymmetr...
Article
Full-text available
Introduction. The mango tree is of prime importance to the rural economy of central and northern Benin since it provides food and crucial nutriments at the end of the dry season. However, mango producers in Benin are confronted with two problems that are closely connected: deterioration of fruit quality by fruit flies and the inadequacy of postharv...
Article
Full-text available
Strict maximum residue limits in export markets are likely to place restrictions on pesticide use on vegetable crops in developing countries. In West Africa, the key factors influencing vegetable farmers' willingness to pay for biopesticides as alternatives to chemical pesticides are assessed. The key factors identified from vegetable producers' su...
Conference Paper
Full-text available
The study assesses the level of adoption of hybrid cultivars of plantain and banana (Musa spp.), promoted through plantain promotion projects based on farmer-to-farmer diffusion and extension events, and determines the factors affecting their adoption and dissemination in four plantain and banana growing areas of Nigeria. Data have been analyzed wi...