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Varietal characteristics of cassava: farmers' perceptions and preferences in semiarid zone of west Africa
(IInternational Institute of Tropical Agriculture, 2003-09)The study examines and models Farmers' perceptions and preferences of cassava· varietal characteristics vis-i-vis the decision ' to adopt cassava cultivars in their fields. The paper is built on the concept of the effect of technology-specific factors on adoption. By way of threshold decision modelling for each of the countries considered, the results reveal different scenario. Based on the varietal characteristics considered, environmental resistance quality (ERQ), high-yielding quality (HYQ), ... -
Banana bunchy top virus threat to African bananas
(Food and Agriculture Organization of the United Nations, 2022-09-07)The banana bunchy top virus (BBTV) is threatening livelihoods and banana biodiversity in sub-Saharan Africa. Since the first report in the 1960s, the virus has spread to 17 countries, eight of those in the last decade, including a recent spread in Uganda and Tanzania. In the "2022 International Plant Protection Convention Regional Workshop for Africa," organized by the FAO-IPPC, the African Union-Inter-African Phytosanitary Council (AU-IAPSC), the Plant Protection Organization of Kenya (KEPHIS), ... -
Direct planting versus transplanting of yam leaf-bud cuttings for seed production
(IInternational Institute of Tropical Agriculture, 2022-11) -
Challenges, opportunities and strategy for cassava subsector development in Nigeria
(2003)Nigeria has substantial economic potential in its agricultural sector. However, despite the importance of agriculture in terms of employment creation, its potential for contributing to economic growth is far from being fully exploited. The sector’s importance fluctuates with any rise and fall in oil revenue and has remained stagnant over the past ten years. The contribution of the manufacturing sector to the GDP declined over the same period. Inappropriate macroeconomic and sector policies perpetuated ... -
Cassava virus diseases in Africa
(2003)Cassava plays a key role in the food security of sub-Saharan Africa, but as a vegetatively propagated crop, it is particularly vulnerable to the effects of virus diseases and these therefore represent a major threat to the livelihoods of millions of Africans. Nine viruses have been isolated from African cassava, but only cassava mosaic geminiviruses (CMGs) and Cassava brown streak virus (CBSV) cause diseases of major economic signifi cance. In recent years, both CMGs and CBSV have come under ... -
Evaluation de nouvelles varieties digname en Cote dIvoire: bilan de trois annees dexperience avec des genotypes ameliores par lIITA
(2003)Assessment of new yam varieties in Côte d’Ivoire : results of three experiments years with improved genotypes by IITA The most important food crop in the Ivory Coast, yam, is cultivated in a traditional system with low productivity. In order to suffice the needs of the growing population the introduction of new technologies increasing the production of yam is mandatory. One way suggested here is the introduction of new improved varieties. The aim of this project was to identify promising varieties ... -
Tracking the magnitude of climate change and variability with remote sensing data to improve targeting of climate smart agricultural technologies
(IEEE Xplore, 2019-07-14)Quantifying the magnitude and significance of climate change variables over space and time in Africa is challenging due to sparse distribution of weather stations and poor quality of existing data. Time series climate data generated from remote sensing platforms could provide plausible alternative for measuring the trends of climate change in data limiting context. This study utilise time series remote sensing data for rainfall, maximum temperature and minimum temperature to investigate the magnitude ... -
Evaluation and taxonomy of agronomically important Striga species
(1996)Taxonomic studies of the taxa clustered about Striga asiatica, S. hermonthica, and S. gesnerioides are presented based on a cladistic study of African plants. The S. asiatica cluster includes S. elegans, S. hirsuta, and S. lutea. Striga asiatica is considered to be derived from a native species near S. elegans. Artificial hybridization indicates a close relationship between S. hermonthica and S. aspera. Several host morphotypes of S. gesnerioides were examined. While each morphotype exhibits ...
