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Techniques for evaluating biological control of cassava mealybug (Phenacoccusmanihoti Matile-Ferrero), mango mealybug (Rastrococcus invadens Williams), and spiralling whitefly (Aleurodicus dispersus Russell) are described. In each case, two exotic hymenopterous parasitoids were introduced. Alone ...


Neuenschwander, P.[Evaluating the efficacy of biological control of three of three exotic homopteran pests in Tropical Africa]Evaluating the efficacy of biological control of three of three exotic homopteran pests in Tropical Africa

Irrigation experiments were conducted during November to April under wheat crop in the winter season of 2012-13 and 2013-14 in the farmer’s field at Galibkhedi village located in Karnal District, Haryana State, India. In the study, collapsible multi-outlet pipe (MOP) along with single outlets pip...


Rajurkar, G.B.Patel, N.Natarajan, RajmohanRajput, T.B.S.Prathapar, Sanmugam A.Varghese, C.[Irrigation application efficiency and uniformity of water distribution using multi-outlet pipe and resource conservation technologies]Irrigation application efficiency and uniformity of water distribution using multi-outlet pipe and resource conservation technologies

Farmers of rainfed cowpea/groundnut/millet/sorghum cropping systems in Kano, Nigeria, ranked arthropods as the major production constraint in cowpea and groundnut in 1991 and 1992. At least 25% of the farmers also reported severe infestations by Striga gesneroides a parasitic weed of cowpea. Drou...


Bottenberg, H.[Farmers perceptions of crop pests and pest control practices in rainfed cowpea cropping systems in Kano, Nigeria]Farmers perceptions of crop pests and pest control practices in rainfed cowpea cropping systems in Kano, Nigeria
Autor: Jagtap, S.S.

The focus of this study is to provide baseline data for agricultural development activities in Nigeria, with emphasis on understanding the dynamics of spatial and temporal change in annual, seasonal and monthly rainfall during the past 30 years (1961-1990), using daily rainfall data. It was found...


Jagtap, S.S.[Changes in annual, seasonal and monthly rainfall in Nigeria during 1961-90 and consequences to agriculture]Changes in annual, seasonal and monthly rainfall in Nigeria during 1961-90 and consequences to agriculture

This paper examines the diffusion and adoption of improved mangrove swamp rice varieties (MV's) in Guinea Bissau, using evidence from the Cumbidja River Basin, a major mangrove rice growing area of the country. The results of the study show that the adoption of MV's has been rapid and impressive ...


Adesina, A.Seidi, S.[Farmers perceptions and adoption of new agricultural technology: analysis of modern mangrove rice varieties in Guinea Bissau]Farmers perceptions and adoption of new agricultural technology: analysis of modern mangrove rice varieties in Guinea Bissau

The severity and increase of the Imperata cylindrica constraint as a weed, the decline of the traditional fallow systems as a means of soil fertility management and the lack of inorganic fertilizer appear to have created opportunities for adoption of mucuna (Mucuna pruriens) technology by smallho...


Sanginga, N.Ibewiro, B.Houngnandan, P.Vanlauwe, BernardOkogun, J.A.Akobundu, I.O.Versteeg, M.[Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa]Evaluation of symbiotic properties and nitrogen contribution of mucuna to maize grown in the derived savanna of West Africa

This article shows that the measurement of the sustainability of a production system should be conducted using a systems approach which corresponds best with the social, economic and bio-physical parameters of the African smallholder farming system. The case study shows that the system as a whole...


Manyong, A.M.Degand, J.[Sustainability of African smallholder farming systems: case study of highland areas of Central Africa]Sustainability of African smallholder farming systems: case study of highland areas of Central Africa

In developing regions with high levels of poverty and a dependence on climate sensitive agriculture, studies focusing on climate change adaptation, planning, and policy processes, have gained relative importance over the years. This study assesses the impact of farmer perceptions regarding climat...


Makate, CliftonMakate, MarshallMango, Nelson[Smallholder Farmers’ Perceptions on Climate Change and the Use of Sustainable Agricultural Practices in the Chinyanja Triangle, Southern Africa]Smallholder Farmers’ Perceptions on Climate Change and the Use of Sustainable Agricultural Practices in the Chinyanja Triangle, Southern Africa

Sustainable intensification (SI) is promoted as a rural development paradigm for sub-Saharan Africa. Achieving SI requires smallholder farmers to have access to information that is context-specific, increases their decision-making capacities, and adapts to changing environments. Current extension...


Ortiz-Crespo, BertaSteinke, JonathanQuirós, Carlos F.van de Gevel, JeskeDaudi, HappyMgimiloko, Majuto Gasparvan Etten, Jacob[User-centred design of a digital advisory service: enhancing public agricultural extension for sustainable intensification in Tanzania]User-centred design of a digital advisory service: enhancing public agricultural extension for sustainable intensification in Tanzania

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