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Conference Documents: Recent submissions
Now showing items 521-540 of 597
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A participatory adoption of improved crop technologies in the savannas of West Africa: empirical study from Borno, Nigeria
(African Crop Science Society, 2007)A Participatory Impact assessment (PASS) was undertaken to evaluate the adoption of improved crop technologies by farmers in the savannas of Borno State, Nigeria. A total of 476 people including 288 men and 188 women participated in PASS. These included representatives of 97 farmer groups/CBOs, out of a total of 287 such groups with which IITA is presently working. PASS measured adoption in three ways, firstly through discussion with participating groups, secondly with a number of key individual ... -
Assessment of past and present soil conservation initiatives in Nigeria, West Africa
(Tropentag, 2007)Soil conservation has a long tradition in West Africa and various on-farm and off-farm soil conservation technologies already exist. An extensive literature review has shown that mulching, crop management and conservation tillage are adequate measures for combating soil degradative processes such as soil loss in the savanna of Nigeria. Most farmers are in general aware of environmental problems but adopt only technologies which are compatible with the present farming system and whose costs of ... -
Evaluation of cowpea genotypes for their reactions to Striga gesnerioides in the dry savanna of northeast Nigeria
(African Crop Science Society, 2007)The parasitic weed Striga gesnerioides (Willd) Vatke is one of the most important constraints to cowpea production in the dry savanna. Yield losses due to S. gesnerioides range from 83 to 100%. No single method however seems to be fully adequate in the control of this parasite. One practice, host plant resistance, appears to have merit in effectively and economically controlling the parasite in that it is affordable to farmers. A total of 30 breeding lines including some varieties were evaluated ... -
Cultivar and insecticide spraying regimes effects on insect pests and grain yield of cowpea in the dry savannas of north-eastern Nigeria
(African Crop Science Society, 2007)Cowpea is an important food legume and versatile crop in the savannas of northeast Nigeria. Despite the high potential for production in this region, insect pests are a major constraint. A study was conducted to evaluate the response of diverse cowpea genotypes to different schedules of spraying with an insecticide. The study revealed that flower thrips the legume pod borer, (Maruca), and a range of pod sucking bugs were the major insect pests. Application of insecticides increased grain yield by ... -
Development of polyclonal antibody-based competitive ELISA for the estimation of aflatoxin B1-lysine biomarker in humans
(Indian Association for Cancer Research, 2007) -
IPM contributions to the achievement of Millennium Development Goals of halving hunger and poverty
(British Crop Protection Council, 2007) -
Effect of weed competition on upland rice production in north-eastern Nigeria
(African Crop Science Society, 2007)Rice production by smallholder farmers in the savannas of Nigeria is constrained by weed competition. A field study was conducted to assess the effect of weed competition on the performance of upland rice varieties in 2005 and 2006 in the northern Guinea and Sudan savannas of Nigeria. The experiment was set up as a split plot in randomized complete block design. One hoe weeding at 3 weeks and two hoe-weeding regimes at 3 and 6 weeks after planting and a weedy plot were the main plot treatments. ... -
Consultative Group on International Agricultural Research (CGIAR) research-for-development agenda on mycotoxins for enhanced food safety and trade
(British Crop Protection Council, 2007) -
Breeding strategies to improve maize for adaptation to low soil nitrogen in West and Central Africa
(African Crop Science Society, 2007)The moist savannas of West and Central Africa have great potential for maize grain production due to high levels of radiation and reduced incidence of pests and diseases. However, soils in this zone are generally low in organic matter and cation exchange capacity in addition to land use intensification. Improving productivity of maize in the savannas will therefore rely on improving soil fertility, ensuring efficient use of inputs and low-N tolerant maize varieties. Breeding maize for adaptation ... -
Current Status of Root and Tuber Crops Improvement, Production and Utilization in Sierra Leone
(2012-10)Cassava (Manihot esculenta Crantz) is the second most important food crop after rice, the staple in Sierra Leone; it is also the most important root and tuber crop. It is followed by sweet potato (Ipomoea batatas L.), yam (Dioscorea spp.), which forms part of the traditional farming system and has only recently been included in the research agenda of NARC/SLARI and potato (Solanum tuberosum L) aka “Irish” potato in Sierra Leone, an introduced crop from neighbouring Republic of Guinea. Genetic ... -
Elasticity of demand of major root and tuber crop in the rural forest zone: implications for research for development
(2010)This paper analyses food consumption in rural households of forest zones. Based on a panel survey of 80 households in Cameroon, expenditure-elasticities of demand for roots and tubers are estimated and compared with those of other staples. Yam and cassava are the two most important root and tuber crops grown in Africa. The expenditure elasticity estimates for yam revealed that the domestic market potentials are high in forest zone for this crop, while in the case of cassava, it was established ... -
Improving the productivity of cowpea in the savannas of northeast Nigeria through participatory evaluation and dissemination of improved varieties
(International Institute of Tropical Agriculture, 2012)Cowpea is a major food and cash crop in northern Nigeria, providing nutritious grain and a less expensive source of protein for both the rural poor and urban consumers. A number of improved varieties have been developed combining diverse plant type, and different maturity periods, with resistance or tolerance to several diseases, insect pests, and parasitic weeds and possessing other good agronomic traits. Despite this, farmers in northeast Nigeria have continued to grow predominantly local ... -
An improved consensus genetic linkage map of cowpea ( Vigna unguiculata L. Walp. )
(2012-10)Consensus genetic linkage maps are formed from merging individual linkage maps. They provide powerful tools for genetic analysis and a foundation for marker-assisted breeding, trait mapping, and positional cloning. In 2009, the first cowpea consensus map was developed. It included 928 markers spanning 11 linkage groups over a total map size of 680 centimorgans (cM), a 0.73 cM average marker distance. The map was the result of merging maps from 6 RIL populations genotyped with a 1536-SNP multiplexed ... -
Impact of climate change on the interdependency between countries in the use and exchange of microorganisms
(International Institute of Tropical Agriculture, 2009) -
International Plant Diagnostic Newtork (IPDN)
(International Institute of Tropical Agriculture, 2009) -
GIS based gap analysis as a tool for biodiversity conservation optimisation: the IITA cowpea collection
(2009-10)Cowpea (Vigna unguiculata(L.) Walp.) is an important grain legume cultivated in most tropical and some temperate regions. It is one of the most widely adapted, versatile grain legumes of high nutritious value. Cowpea production across Africa accounts for approx.91 % of world output. Cowpea has an impact on nutrition as valuable protein source and livelihoods of small scale farmers and plays a key role in the life of many people, especially in developing countries. The International Institute of ... -
Incidence of Aspergillus section Flavi strains and aflatoxin production in some market samples of Dioscorea yam chips from various towns in Nigeria
(International Institute of Tropical Agriculture, 2009) -
Weed management in Africa: experiences, challenges and opportunities
(British Crop Protection Council, 2007) -
Chemical properties and consumer acceptability of analogue rice produced from cassava (Manihot esculenta) and maize (Zea mays)
(Nigerian Institute of Food Science and Technology, 2017) -
Effect of nitrogen fertilizer and cassava variety on the sensory quality of composite bread
(International Institute of Tropical Agriculture, 2010)This paper reports how field application of nitrogen fertilizer and cassava variety affects the sensory quality of composite cassava-wheat bread. Fertilizer dosages of 0 and 160 kg/ha were applied during the raining season in a completely randomized trial plot located in Mokwa, in the Guinea savannah belt of Nigeria. The main effect of variety was significant on crust color and appearance (p<0.01) whereas fertilized application significantly influenced crumb structure and crust appearance (p<0.01). ...
