What is it about?
Late blight disease is a major threat to potato farming in Kenya, causing big losses for smallholder farmers and raising production costs due to heavy fungicide use. To tackle this, scientists have developed a new type of potato—the 3R-gene potato—which is genetically engineered to resist late blight. This study assessed the economic value of introducing three 3R-gene potato varieties in Kenya (Shangi, Asante, and Tigoni). Using expert opinions and economic models, the research found that 3R-gene Shangi would provide the greatest benefit to both farmers and consumers, saving costs and increasing productivity.
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Why is it important?
Our findings show that: • 3R-gene Shangi could generate over KES 845 million (US$ 8.2 million) in annual benefits. • The technology could lift over 90,000 people out of poverty over its lifetime. • Avoiding delays in releasing the variety is important—each year of delay could cost the country over KES 13 billion in lost benefits, as estimated using the Social Incremental Reversible Benefits approach under the real options model.
Perspectives
In my view, releasing these improved potato varieties—particularly the 3R-gene Shangi—offers a timely opportunity to support both farmers and consumers in Kenya. By reducing dependence on fungicides, the technology can lower production costs for farmers, lessen environmental impact, and contribute meaningfully to national food security
Evelyne Kihiu
Centro Internacional de la Papa
Read the Original
This page is a summary of: Ex ante economic impact assessment of the 3R-gene potato in Kenya, PLOS One, March 2025, PLOS,
DOI: 10.1371/journal.pone.0309329.
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