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Blog Archives

Effect of temperature on the development, reproduction and mortality of the sweetpotato weevil Cylas brunneus (Fabricius) (Coleoptera: Brentidae)

The sweetpotato weevil, Cylas brunneus, is a serious insect pest of sweetpotato (Ipomoea batatas (L.) Lam.) in East and West Africa. Knowledge on the influence of temperature on development, reproduction and mortality of this pest is important in understanding its potential population growth and geographical distribution. Such knowledge is a pre-requisite …

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Farmers’ Perception of and Coping Strategies to Climate Change: Evidence From Six Agro-Ecological Zones of Uganda

In Uganda, weather-related events such as prolonged dry seasons, floods, storms, mudslides, extreme rainfall, and delayed/early rains have become more frequent and/or intense. This has left most of the rural poor farmers’ food insecure and their livelihoods threatened. A total of 192 sweetpotato farmer households distributed in six agro-ecological zones …

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Working with farmer groups in Uganda to develop new sweet potato cultivars: decentralisation and building on traditional approaches

Scientists and farmers in Uganda identiÞed preferred sweet potato: (1) varieties through participatory varietal selection (PVS); and (2) new clones from seedling populations through a participatory plant breeding (PPB) approach. During these two processes, farmers identiÞed 51 attributes of their landraces and of released varieties and used 21 criteria to …

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Novel Plant Regeneration for Egyptian Sweetpotato (Ipomoea Batatas (L.) Lam.) Abees Cultivar via Indirect Organogenesis Stimulated by Initiation Medium and Cytokinin Effects

In this study, a simple and efficient plant regeneration system in Egyptian sweetpotato Abees recalcitrant cultivar via indirect organogenesis was established. Two initiation medium and different regeneration medium were tested. Hormone free initiation medium (HFIM) treatment was found to be critical for induction of regenerative callus. Likewise, callus diagnostic structural …

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Biotechnology Applications for Improving Sweetpotato Production

Sweetpotato, (Ipomoea batatas L.), is a vegetatively propagated crop. Due to the cycles of propagation, viruses are accumulated, which contributes to the decline of sweetpotato yield and quality. Stem cuttings of Abees cultivar were collected from several locations in Egypt and kept under controlled greenhouse conditions. Samples were tested for …

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Are millipedes a pest in low-input crop production in north-eastern Uganda? Farmers' perception and experimentation

Farmers’ perception was collected and experiments were done, through a series of research work between 2000 to 2003 in north-eastern Uganda. This research work included: (i) Field survey on farmers’ knowledge on sweet potato production and perception of millipede infestation; (ii) Field assessment of pests in sweet potato and other …

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