Search Results - "West Africa"

Impact of infestation by parasitic weeds on rice farmers' productivity and technical efficiency in sub-Saharan Africa by Ncho, S.A., Mourits, M., Demont, M., Adegbola, Patrice Ygue, Lansink, A.O.

“…Household and field survey data were collected from rice farmers in Cote d’Ivoire and Benin in West Africa. A stochastic frontier production function was estimated, which allows for identifying the levels of exogenous factors that prevent farmers from improving technical efficiency levels. …”
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Determinants of adoption and intensity of use of balance nutrient management systems technologies in the northern Guinea savanna of Nigeria by Akinola, Adebayo A., Alene, Arega D., Adeyemo, R., Sanogo, D., Olanrewaju, A.S., Nwoke, C., Nziguheba, Generose

“…As part of a major effort to address soil fertility decline in West Africa, an integrated soil fertility management project promoted two technology packages: a combined application of inorganic fertilizer and manure (BNMS-manure) and a soybean/maize rotation practice (BNMS-rotation) in the northern Guinea savanna (NGS) of Nigeria. …”
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An insight in the reproductive biology of Therophilus javanus (Hymenoptera, Braconidae, and Agathidinae), a potential biological control agent against the legume pod borer (Lepidop... by Souna, D.A., Bokonon-Ganta, A.H., Ravallec, M., Cusumano, A., Pittendrigh, Barry Robert, Volkoff, A.N., Tamò, Manuele

“…Therophilus javanus is a koinobiont, solitary larval endoparasitoid currently being considered as a biological control agent against the pod borer Maruca vitrata, a devastating cowpea pest causing 20–80% crop losses in West Africa. We investigated ovary morphology and anatomy, oogenesis, potential fecundity, and egg load in T. javanus, as well as the effect of factors such as age of the female and parasitoid/host size at oviposition on egg load.The number of ovarioles was found to be variable and significantly influenced by the age/size of the M. vitrata caterpillar when parasitized. …”
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An evaluation of farmer field school induced changes in Ghanaian cocoa production by Gockowski, J., Asamoah, C., David, S., Gyamfi, I., Adu-Kumi, M.

“…A case study of Ghanaian cocoa farmer field schools was conducted to provide feedback on a regional effort to close the yield gap across the cocoa belt of West Africa. Production practices were significantly modified in the year following training with notable increases registered in both the number of producers planting hand pollinated hybrid cocoa seedlings and in the area planted to hybrids. …”
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Growth characteristics of ten Mucuna accessions and their effect on speargrass Imperata cylindrica (L.) dry matter by Chikoye, David, Ekeleme, F.

“…Rauesch. is one of the most common and difficult weeds to control in many crops grown in West Africa. Studies were conducted from 1997 to 1999 in the forest/savannah transition zone to identify growth characteristics that enhance the competitive ability of Mucuna accessions against I. cylindrica. …”
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Cowpea in traditional cropping systems by Mortimore, M., Singh, B., Harris, F., Blade, S.

“…In traditional cropping systems in West Africa, a diversity of both systems and varieties is observed. …”
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Epidemiology of Stenocarpella macrospora (Earle) Sutton on maize in the midaltitude zone of Nigeria by Olatinwo, R.O., Cardwell, K.F., Deadman, M.L., Julian, A.M.

“…The level of disease at a farm in Jos (West Africa Milk Company farm) was significantly greater than those at the other two locations (UTC Tenti and Saminaka), which had reduced or zero debris from the previous year's cultivation. …”
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Exploitation of a woody host plant and cerambycidassociated volatiles as hostfinding cues by the larger grain borer (Coleoptera: Bostrichidae) by Borgemeister, C., Goergen, Georg E., Tchabi, A., Awande, S., Markham, R., Scholz, D.

“…Elliot) Keay attacked by the girdling cerambycid Analeptes trifasciata F. in the Lama forest of central Benin, West Africa. Emergence data from A. trifasciata wood samples revealed a diverse insect fauna, which consisted of 27 primarily coleopteran species of 8 different families. …”
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Genotype x environment interaction studies with cassava by Otoo, J., Dixon, A., Asiedu, Robert, Okeke, J., Maroya, N., Tougnon, K., Okoli, O., Tetteh, J., Hahn, S.

“…Multilocational trials were conducted in several agroecological zones in West Africa to assess the magnitude of genotype x environment (G x E) interaction and to identify stable varieties which could be used in breeding programs in the region. …”
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Effect of mound height and cassava cultivar on cassava performance under a fluctuating water table by Mohamoud, Y.

“…Field experiments were conducted at Ibadan and Bida in Nigeria, west Africa, to investigate the effect of mound height and cassava cultivar on cassava performance (tuber yield, top yield, tuber length, and plant height). …”
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Hostfinding behavior of Dinoderus bifoveolatus (Coleoptera: Bostrichidae), an important pest of stored cassava: the role of plant volatiles and odors of conspecifics by Borgemeister, C., Schäfer, K., Goergen, Georg E., Awande, S., Setamou, M., Poehling, H.M., Scholz, D.

“…In cassava chips sampled on a local market in Cotonou, Republic of Benin, West Africa, Dinoderus bifoveolatus Wollaston was the predominant pest. …”
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Thermal ecology of Zonocerus variegatus and its effect on biocontrol using pathogens by Blanford, S., Thomas, M.B., Langewald, J.

“…1 Thermal behaviour of the variegated grasshopper, Zonocerus variegatus, was investigated in the humid tropical zone of southern Benin, west Africa, in the dry seasons of 1996 and 1998. In 1998, investigations included studies of a population of grasshoppers sprayed with an oil‐based formulation of the entomopathogenic fungus Metarhizium anisopliae var acridum. 2 Body temperature measurements and observations of thermal behaviour both in the field and on thermal gradients in the laboratory, suggest that Z. variegatus was not an active behavioural thermoregulator. …”
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Persistence of Mucuna pruriens biomass during the dry season along an agroecological transect in Benin by Carsky, R.J., Eteka, A.

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The economics of cocoa-fruit agroforests in Southern Cameroon by Gockowski, J, Dury, S

“…However, soil fertility and weed pressure are technical problems that must be overcome if cocoa agroforests are to be established in the Chromolaena odorata thickets that characterize the short fallow land uses in West Africa. Fertilizer supplementation and increased labor will be required for weed control, particularly during the establishment phase, yet fertilizer use is not currently practiced in cocoa agroforests in southern Cameroon, as cost and availability limit its use.…”
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The Cape Verde region (1499 to 1549); the key to coconut culture in the Western hemisphere by Harries, H.C.

“…Epidemic lethal diseases in parts of the Caribbean and West Africa could continue to spread to all of these territories because these coconut populations are completely susceptible.…”
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Second TAC Quinquennial Review of CIMMYT, 1983 by CGIAR Technical Advisory Committee

“…These included: the recommendation that CIMMYT strengthen its scientific work; that it pay more attention to the need for maintenance research and the division of responsibility between it an NARS for such research; that CIMMYT move toward a longer term approach to conservation of genetic resources; that training remain a high priority; that CIMMYT give more attention to the communication of its results; and the need to define the division of responsibility between CIMMYT and ICARDA for barley and durum wheat, and between CIMMYT and IITA for maize in West Africa. TAC and the panel recommended increased resources for CIMMYT. …”
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Quelles politiques pour ameliorer la competitivite des petits eleveurs dans le corridor central de l'Afrique de l'Ouest: implications pour le commerce et l'integration regionale by Ehui, Simeon K., Barry, M.B., Williams, Timothy O., Koffi-Koumi, M., Paulos, Z.

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Improving Cocoa sector Climate-Smart Awareness and decision-making by International Institute of Tropical Agriculture, CGIAR Research Program on Climate Change, Agriculture and Food Security, Rainforest Alliance, Root Capital, Sustainable Food Lab

“…The cocoa sector recognizes climate change and weather volatility as direct threats to their businesses, and some are acting to incorporate climate smart practices into their programs in West Africa. This case study shares cocoa companies’ perceptions regarding the usefulness of the Climate Change, Agriculture and Food Security (CCAFS)-led Consortium’s research and onvening on climate smart cocoa (CSC) in Ghana, also in connection to the USAID Feed the Future Climate Smart Cocoa Program, led by the World Cocoa Foundation (WCF). …”
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Comparison of the Tercile and Probability Distribution Formats of Seasonal Forecast Information for Climate Services Applications by Siebert, Asher

“…Greater Horn of Africa, West Africa, Southern Africa, South Asia, Southeast Asia, Caribbean and Latin America) have had a tendency to present their central findings in the format of consensus based maps of tercile probabilities of rainfall and temperature for the coming season. …”
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Storage systems for maize ( Zea mays L.) in Nigeria from five agroecological zones by Udoh, J., Ikotun, T., Cardwell, K.

“…An international project to assess the extent of aflatoxin contamination of maize in West Africa has begun in Nigeria. A survey was conducted from October 1992 to July 1993 to identify maize storage systems used by farmers in five major agro-ecological zones in Nigeria and the problem associated with such systems. …”
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