A systematic review on enhancing the technical efficiency of genetically modified maize adoption in Sub-Saharan Africa: the role of agricultural extension services and barriers to success

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Genetically modified (GM) maize holds significant potential to enhance agricultural productivity, food security, and farm returns. Yet, varying technical efficiency levels have been reported across countries, coupled with different levels of effectiveness of agricultural extension services, which could enhance high efficiency. This systematic review examines the impact of agricultural extension services on the technical efficiency of GM maize adoption in sub-Saharan Africa. A literature search across multiple databases identified 68 peer-reviewed studies (2011–2024) that focused on technical efficiency and extension services. The review found that effective extension services significantly improve technical efficiency in GM maize adoption. However, challenges such as limited information, strict regulations, high seed costs, and biosafety concerns hinder adoption. The review highlights the importance of targeted support for smallholder farmers and calls for tailored extension programs that address farmers’ specific needs. Additionally, encouraging collaboration between government agencies, NGOs, and local communities is essential for developing inclusive extension strategies that bridge knowledge gaps and promote sustainable agricultural practices.

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