Seed potato quality improvement through positive selection by smallholder farmers in Kenya

In Kenya, seed potato quality is often a major yield constraint in potato production as smallholder farmers use farm-saved seed without proper management of seed-borne pests and diseases. Farm-saved seed is therefore often highly degenerated. We carried out on-farm research to assess whether farmer-managed positive seed selection could improve yield. Positive selection gave an average yield increase in farmer-managed trials of 34%, corresponding to a 284-€ increase in profit per hectare at an additional production cost of only 6€/ha. Positive selection can be an important alternative and complementary technology to regular seed replacement, especially in the context of imperfect rural economies characterized by high risks of production and insecure markets. It does not require cash investments and is thus accessible for all potato producers. It can also be applied where access to highquality seed is not guaranteed. The technology is also suitable for landraces and not recognized cultivars that cannot be multiplied formally. Finally, the technology fits seamlessly within the seed systems of Sub-Saharan Africa, which are dominated by self-supply and neighbour supply of seed potatoes

Chagua iliyo bora zaidi. Uchaguzi muafaka ili kuimarisha mbegu za viazi mviringo shambani. Mwongozo kwa mkufunzi

This training manual is designed to provide step-by step instructions to trainers in teaching potato farmers positive selection, that is, to ‘select the best’. Positive selection can be used to improve the quality of the seed potatoes saved from the farmers own crop. The manual contains two major sections. The first section provides the background behind the technology: what are the major seed borne potato diseases; when can ‘select the best’ be helpful; and how does it actually work. The second section outlines the training program to teach positive selection to a farmer group. The heart of the training program is a demonstration experiment. The training methodology is based on learning by doing, using the field as the classroom

Select the best. Positive selection to improve farm saved seed potatoes. Trainers manual.

This training manual is designed to provide step-by step instructions to trainers in teaching potato farmers positive selection, that is, to ‘select the best’. Positive selection can be used to improve the quality of the seed potatoes saved from the farmers own crop. The manual contains two major sections. The first section provides the background behind the technology: what are the major seed borne potato diseases; when can ‘select the best’ be helpful; and how does it actually work. The second section outlines the training program to teach positive selection to a farmer group. The heart of the training program is a demonstration experiment. The training methodology is based on learning by doing, using the field as the classroom

Positive selection in seed potato production in Kenya as a case of successful research-led innovation

By identifying the success factors of a programme on positive seed potato selection, this article analyses the role of research in agricultural innovation. The positive seed selection programme developed an approach to improve the quality of seed potatoes by ware potato growers, complementary to specialized seed production systems now widely promoted in sub-Saharan Africa. With more weight being placed on innovation rather than on research outcome, the role of research has been widened and research has assumed responsibility for developing and piloting effective training through partnership with extension. Researchers effectively contributed to innovation because they were given and took the liberty of pursuing a ‘bright idea’. The case discussed in this article points out that innovation can emerge from old technology within existing institutional environments, and can be surprisingly simple as long as researchers have room to manoeuvre and opportunity to engage in partnerships with practitioners

Improving Potato Production in Kenya, Uganda and Ethiopia: A System Diagnosis

Increased productivity of potatoes can improve the livelihood of smallholder potato farmers in Kenya, Uganda and Ethiopia and is required to meet the growing demand. This paper investigates the opportunities for potato system improvement that could result in improved productivity. Through a diagnosis of the potato systems in the three countries on the basis of surveys and stakeholder workshops, seed potato quality management, bacterial wilt control, late blight control and soil fertility management were identified as key technical intervention topics. For effective problem solving in these areas, the functioning of the potato innovation system requires improvement to better deliver the functions of potato marketing as well as knowledge development and information exchange. With use of a ‘system failure framework’ the shortcomings of the potato innovation system are identified and discussed and options for improvement are suggested