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Conference Documents: Recent submissions
Now showing items 261-280 of 597
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Livelihood strategies of resource poor farmers in strigainfested areas of western Kenya
(2007)Striga hermonthica (del) Benth is threatening rural livelihoods in western Kenya where maize is the major food and cash crop. Vulnerability analysis was conducted on a sample of 802 households in eight districts of Nyanza and Western provinces. Farmers perceived Striga as the major cause of poverty and food insecurity. Both household income and child nutrition indicators showed alarming conditions for the majority of households. The coping strategies and informal safety nets were not capable of ... -
Adaptations of cocoa and coffee farmers communities in the heart of remnant pristine forest of east Cameroon to institutional changes
(2006)With support provided by the state, cocoa and coffee are among the main perennial crops providing income to farmers living in the heart of the pristine forest of East Cameroon (Northern part of the Congo Basin). Regular in comes from these perennial crops have enabled farmers not to depend solely on forest resources. But During the 80s and 90s, some mains changes (cocoa and coffee crisis, liberalization of the economy and agricultural sectors and devaluation of local currency) occurred and influenced ... -
Transiting cassava into an urban food and industrial commodity through agroprocessing and marketing driven approaches: lessons from Africa
(2009)The International Institute of Tropical Agriculture (IITA), in partnership with African institutions, is testing a research for development (R4D) approach to develop cassava productivity and agro-industry to reduce poverty and hunger in Africa. During the research phase (1983–1995), agro-processing technologies for making intermediate cassava products such as high quality cassava flour (HQCF) were developed for industrial applications and for making ready-to-eat urban foods. These were tested at ... -
Offseason yam production in Nigeria
(2008) -
Determinants de ladoption des technologies de transformation de ligname: cas de la transformation en cossettes et en farine au nord de la Cote Divoire
(2009)Cet Journal Article propose une analyse empirique de l’adoption des technologies de transformation de l’igname. L’étude, qui est l’une des rares analyse dans le domaine de l’igname à s’intéresser à l’adoption des procédés de transformation, explore les liens entre les caractéristiques sociales, culturelles et professionnelles des paysans et l’adoption des technologies de transformation. Son objectif principal est d’identifier les déterminants de l’adoption de la technologie de ... -
An assessment of the potential efficiency and profitability of valueaddition and marketing innovations involving smallholder farmers under a pilot system in Tanzania
(2009)An assessment of four pilot processing centers in Tanzania, established for processing cassava to high quality cassava flour, chips and starch based on IITA technologies was carried out from 2003 to 2005. We followed the value chain analysis approach, looking in detail at processing efficiency and relating it to market dynamics in particular of the fresh cassava or raw material market. Locations with large volumes of fresh cassava were found to be very favorable for such enterprises, as prices are ... -
The role of community based organisations' NGOs and farmers in technology transfer
(International Society For Tropical Root Crops, 2007)Cassava (Manihot esculenta Crantz) and sweetpotato (Ipomoea batatas) are key food crops in Tanzania in general and in the lake zone in particular. Cassava and sweetpotato are household food security crops in addition to being a source of household income. Availability of the new improved varieties to farmers has been a problem in Tanzania. A project was initiated to transfer improved varieties of both cassava and sweetpotato in the lake zone to farmers. In collaboration with community-based ... -
Changes in population abundance of the African root and tuber scale stictococcus vayssierei Richard (hornoptera; stictococcidae) on cassava in the bas-fleuve district in the democratic Republic of Congo
(International Society For Tropical Root Crops-Africa Branch, 2007)A two year follow up of the African root and tuber scale (ARTS) population dynamics was conducted on two cassava cultivars, a sweet variety Lueki and a bitter variety Mvuama, in a highly infested site of secondary agro-ecological forest zone of Bas-Flueve District, in D.R. Congo. Both cultivars were infested throughout the period of the observations, but significantly higher populations (P< 0.01) occurred on the sweet variety Lueki while the bitter variety Mvuama harboured less scales. Three ... -
The spread and persistence of exotic phytoseiid, typhlodromahs aripo de leon (acari: phytoseiidae) and its effect on cassava green mite in Kenya
(International Society For Tropical Root Crops-Africa Branch, 2007)Cassava green mite, Mononychellus tanajoa (Bondar) has been a major pest of cassava since its accidental introduction in Africa. Studies conducted recently on its biological control in the major cassava growing areas in Kenya demonstrate definite establishment of Typhlodromalus aripo in Kenya. This exotic predatory mite was not only found to have established and persisted since its introduction in 199516, but have also over the years spread widely to far distant from the original release sites in ... -
Effect of different cowpea - cereal row to row planting systems and insecticide sprays of cowpea on the quality of the crop residues
(African Crop Science Society, 2007)A cropping system trial involving 2 spray treatments, 2 cowpea varieties, and 9 cowpea–cereals cropping patterns involving two cereals was conducted in 1999 and 2000 cropping seasons in Minjibir. The systems involved different row to row combinations of cowpea and millet or sorghum. Selected nutritive qualities of resulting cowpea and cereal stover were measured. Spraying of cowpea had no significant effect on the nutritive value of the cowpea fodder and accompanying cereal stalk. ... -
Modern approaches for cowpea breeding: how highthroughput genotyping and a highdensity map change everything
(2012-9)The genomics revolution has enabled rapid advances in genotyping capabilities and construction of high-density genetic linkage maps that enable new plant breeding strategies which have the potential to expedite delivery of improved crop varieties. These breeding strategies utilize molecular marker information at hundreds to thousands of points in the genome, encompassing selection for multiple traits and/or multigenic traits. This chapter summarizes the opportunities and challenges ...
